Mercedes 300D Suggestions

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Comments

  • reugenioreugenio Member Posts: 2
    When tightening the cover to the oil filter housing,one of the bolts broke.Because the remaining portion of the broken bolt is too short to screw in the nut,oil will spill from the top of the housing.How will I take out the damaged bolt and replace it with another bolt so I can firmly close the oil filter housing cover?
  • brillanzebrillanze Member Posts: 20
    There are bolt extracting bits that you can buy -sets are anywhere from $30-50. They work with your drill and get the bolt out. I have also used a tap -make sure it is one that goes in clockwise, so when you screw a bolt in that is the size of the newly tapped hole, unscrewing it will also unscrew the old bolt (hopefully). The bolt extractors are much easier, and if you break a lot of bolts ( I certainly do!) worth the money. You might also be able to rent a set at Home Depot or even Auto Zone. Also -a friendly mechanic might do this for you inexpensively.
    Good Luck!
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    Oh, are there still some threads left on the broken portion of the bolt. If so, you might be able to "double-nut" it, screwing two nuts on the broken stud, tightening them together, then unscrewing the bottom nut.

    If there's no room to screw on two nuts (there should be, as those studs are pretty long aren't they?) then maybe small vice grips.

    You'd better be DARN sure that no filings of any kind get into the bottom of the oil filter housing, if you have to do any drilling.

    But it looks like from the picture I'm looking at, that no drilling will be required to extract this long stud.
  • burdawgburdawg Member Posts: 1,524
    If there's a small portion of the bolt accessible, and enough clearance you may also be able to use a small file, file a groove in it and turn it out with a flat screwdriver.
  • dparisedparise Member Posts: 2
    Hi
    I just brought my 1979 300D in for service to an old german mechanic who supposedly knows his stuff. The car was running fine accept once a week maybe you start the car and there would be no power just a crawl. Turn it off sart it right back up full power!!! That's why I brought it in. Just picked it up and he said he changed fuel filter, tightened valves (which he said really needed) and blew out gas tank for dirt or rust(my suggestion). Took car home it seemed fine(smoother) now it runs rough (idling) and stalls at idle all the time. Driving is fine but it soon as I come to a stop it starts clunking and dies!!!!
    Help!! its there (at mechanic) now.
  • burdawgburdawg Member Posts: 1,524
    That part about the gas tank concerns me. How was that actually done?
  • dparisedparise Member Posts: 2
    That I don't know, but I got it back yesterday and he readjusted valves (i think loosening them up) so now it doesn't stall but it 's awfully noisy!
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    well loose is way better than tight!!
  • burdawgburdawg Member Posts: 1,524
    The valves need to adjusted right. Typically for mercedes engines with solid lifters there's a cold clearance tolerance and a warm tolerance, of course you use the one based on if the engine is cold or warm. It's always better to adjust them slightly looser so they won't be hanging open at higher rpm's, especially on an older engine with weaker valve springs.
    On a 300D I don't know if the valve noise would be that much more objectionable than the overall diesel noise.
  • 300turbodiesel300turbodiesel Member Posts: 5
    Hi, i have found a 1985 Mercedes 300d turbo for sale and test drove it today and it needs new motor mounts where can i find a good par and how many do i have to buy?
    also approximatively how much would it be to replace it?
  • 300turbodiesel300turbodiesel Member Posts: 5
    Hi, i have found a 1985 Mercedes 300d turbo for sale and test drove it today and it needs new motor mounts where can i find a good par and how many do i have to buy?
    also approximatively how much would it be to replace it?
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    Should be about $90 the pair plus 2 hours installation. On some models there may also be an engine shock absorber.

    How was it determined that it needed new mounts? Has oil leaked on them or are they split.

    If you're trying to cure severe engine roughness, this may or may not be the problem.
  • 300turbodiesel300turbodiesel Member Posts: 5
    Hi, i have recently looked at a 1985 Mercedes-Benz 300d turbo that i am looking to buy i test drove it today and it needs badly motor mounts where can i find new motor mounts and how much would it be to install them?
  • 300turbodiesel300turbodiesel Member Posts: 5
    well the hole car was shaking badly it even poped open the glove box and on the motor mounts the rubber was split and how many motor mounts does the car have?
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    2 or 3 depending. But if the engine is shaking violently like that, you'd best have it checked out before you buy it. You could have a dead cylinder, injection pump out of whack, etc.
  • 300turbodiesel300turbodiesel Member Posts: 5
    there was a screw loose near the bottom drivers side of the engine that was rattling but yea where do you think i should go to get it checked out?
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    I think any place that works on diesels could do the basic compression test, or some German repair shop would probably charge $100--$150 to go through the whole car. Naturally they're going to find stuff wrong, much of which you can live with, on an old car---but I'd hate to see you buy the car only to find out that "motor mounts" was a bad guess (or a curve ball).

    While these engines are noisy, they should be fairly smooth at idle.

    Has this car had good care, or is it sort of a beater?
  • bcparsonsbcparsons Member Posts: 18
    I am collecting water in the right rear passenger compartment and in the right side well of the trunk. I have removed all the carpets and the liner in the trunk well. I am pretty sure that the leak is from the right rear sunroof drain but cannot find access to any of them of the drains. I did test the front drains and they seem to work. There is some rust around the track for the sunroof on the right side and that may be clogging the drain hole.

    What are your thoughts?

    Thanks
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    Have you also checked the tail light gaskets? You can test these by putting newspaper down in the trunk and then hitting the tail lights with a water spray at the car wash.
  • fintailfintail Member Posts: 58,543
    Also maybe the rear windshield seal, which can fail near the bottom.
  • bcparsonsbcparsons Member Posts: 18
    Actually the water in the trunk is running down between the tire well and the body from the area of the door jamb.
    And the water inside is running down the 'B' pillar so that indicates a leak in the sunroof even though the sunroof drains work . I did the test for that one.

    So I'm afraid that the answer to the sunroof drain is to seal(caulk) the sunroof closed and disconnect the switch.
    But the trunk leak is a good one to figure out. Could it be coming in through the belt line trim clip holes?

    Thanks for all your help.
  • dotishdotish Member Posts: 20
    I don't know if this qualifies as a reply or merely commisseration, but I've got a similar sunroof leak and am wondering if there's some way to do something radical like actually fix it. I live in Texas and my A/C is already non-functional, so I really like my sunroof. Does anyone have any experience with a successful leak repair?
  • bcparsonsbcparsons Member Posts: 18
    I've been told by the local water leak doctors that the real repair involves removing the headliner and replacing the sunroof "rack" or pan assembly. You can put your sunroof panel in it. Best thing is to find a wreck and get the part from that car. Being from texas a person imagines that you might be able to find a decent part.
    The guys here (Virginia) estimated it to be a $750 repair job.
  • bcparsonsbcparsons Member Posts: 18
    The rear glass gasket has been replaced.
  • dotishdotish Member Posts: 20
    Thanks for that info. I'll look into it here with local parts dealers and see what I can come up with. It may be worth it to keep a working sunroof.
  • dotishdotish Member Posts: 20
    My 1980 300D has had a problem with Park since I bought it and I'm wondering if it's a common one. When I put the car in Park, it doesn't lock the transmission and it is also not possible to start the car in that position, I have to use use the parking brake and use neutral for starting. It sounds like a linkage adjustment problem to me except that with this car I'm wondering if it might have something to do with the vacuum system, since it seems everything else does. Any insights would be appreciated.
    Thanks
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    Could be the linkage but I can't see any connection to the vacuum system.

    Also, the parking pawl inside the transmission could have broken off, so if the linkage adjustment doesn't work (let's say you are really in reverse when you put it in Park), then you may have to drop the trans pan and see if there's something in there
  • dotishdotish Member Posts: 20
    Sorry to be so slow to reply, but thank you very much. I'll try to adjust the linkage and see what happens. Hopefully, I won't have to go fishing for the parking pawl.
  • imadmanimadman Member Posts: 4
    First of many problems im sure...Car wont roll in neutral does it need power to it? Cant even get it home gees. Been sitting for about 3 yrs, should I run now or revive it? perfect body 175k what ya think?
  • fintailfintail Member Posts: 58,543
    What model/year is it?

    3 years can be a problem, but shouldn't destroy a car unless maybe it sat outside. Is the shift linkage functional, or could the parking brake be stuck?
  • benzsilverbenzsilver Member Posts: 21
    Hello.. and welcome to benz ownership provided this is your first benz.Previous owner or last person who stored car should be able to give you info about why car was stored in the first place. My responses are as follows: 1) if the car was stored outside inthe elements, the discs could be stuck to disc pads due to moisture and rust. 2) The shift linkage could be out of sync and trans could be in park, 3) rear wheels could be jammed by bad pinion gears. I would do the following: a) raise hood and see if you can hand turn over engine several times to make sure engine is not frozen.b) Jack up each wheel to make sure each wheel will turn freely.( make sure emergency brake has been released for back wheels first before attempting to turn back wheels). c) and lastly, it all depends on how much effort you want to put into this project. My car was stored for 8 years. I put fresh diesel and a new battery in it and it started on my first attempt. My girlfreind was totally amased and impressed. Let us know what happens.
  • imadmanimadman Member Posts: 4
    1985 300 turbo Diesel. Freed up all the wheels. Yes the front brakes were rusted. Jacked them up cleaned them up they are free now. Jacked up the back those turned freely. Why cant all cars jack up as easy as a Mercedes? Will look at the tranny linkage another day. The parking brake works properly too. Does sound like the linkage bought manual and thumbing thru it and saw the linkage diagram. 3 years outside although it was covered. Its a Georgia car pretty nice. Did some work at their house needed more than they thought didnt have the money and got a GREAT deal. Will turn the engine over by hand too, good thought. Owned classic cars before but much different in some ways then the benz. Thank you all and im sure youll be hearing from me soon.
  • fintailfintail Member Posts: 58,543
    Good luck...W123s are very sturdy cars, so with some elbow grease, I bet you'll be able to get it back on the road without too much drama.
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    Be sure to drain the fuel and change your two fuel filters.

    175K is a lot of miles so probably even if the basic drivetrain is good (it's pretty sturdy) you'll be dealing with issues.

    Best idea would be to get it started, pump up the tires, and drive it around and assess what you'll need to do versus just buying a ready to run car. These cars are not particularly valuable so sometimes it's much much better to buy one all set to go than try to re-hab a neglected one.

    It's a car well worth saving, but only to a point.
  • hpmctorquehpmctorque Member Posts: 4,600
    Aren't the "all set to go" ones that are for sale rare? I mean, if I owned a good one - not necessarily pristine, but just good - I'd keep it.
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    edited July 2010
    Well these aren't Duesenbergs after all---true, you might pay a relatively higher price for a nice one, but really I don't think there's a 300D or 300SD in the world worth more than $5,000--$6000, and you could easily run up repair bills to exceed that if you have to sort out injection pumps, transmissions, or rear suspensions.

    The reason there are few good ones around is that they sell for cheap, and fall into the hands of people who haven't anywhere near the means to maintain them.

    So it's a downward spiral. The only good ones left are usually original owners, or someone who restored one despite the financial loss in doing so.

    Also, diesel fuel costs are now as high as gasoline, or higher, and modern diesels are so much better than the older ones.

    So most of them end up as laboratory experiments for the biodiesel freaks, which is amusing, but not necessarily the best fate for the car.
  • imadmanimadman Member Posts: 4
    I didnt follow your advice even though I should've. I didnt drain the fuel or change the filters. I tried to charge the battery and it didnt take. I plopped it back into the Benz and jumped it with the van after an hour or so charging that son of a gun fired right up!! After almost 3 yrs sitting. I let her idle for 3 hours driving her a couple times in front of the house, no registration yet. Turned her off let her take a breather jumped her again fired right up again. WOW. Not usually my luck with older cars. Needs a few things, couple fuel filters, oil change some fresh fuel, and a battery. Does leak a little fuel around 2 of the injectors I believe. Do those have a little rubber gasket inside of them? Or can I give her a little tweak with a wrench to see if that does the trick? Ok Mr. S. I'll follow your advice to the letter this time. Just didnt want to sink too much $$ into her, however I will throw a little attention her way. The moon roof doesnt even leak, it rained crazy yesturday and no leaks, nice.
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    edited July 2010
    Well I tell people to drain the fuel and do the filters because diesel fuel tanks accumulate algae of all things, which can get sucked up into the entire injection system rather than just lay in the tank, if you start a stored car without doing this.

    I hope you did indeed dodge a bullet on that. If the injection pump gets fouled up badly, you might as well throw the car away. I cannot emphasize the need for clean, CLEAN fuel at all times for these old soldiers.

    If your new filters clog up periodically, you'll have to drain the tank. Along with filter changes (you have two fuel filters I believe), throw in some BIOCIDE and some cleaner/additive, like from REDLINE.

    Other weak spots to watch out for are breaking window regulators, defective heat/AC controls, sagging rear suspension, defective vacuum lines (car won't shut off easily), noisy differentials (Just Live With It) and, as I mentioned, fuel contamination.

    These are GREAT cars but don't drink the Kool-Aid regarding their mythological invincibility---they require your attention and care, which it sounds like you are willing and able to give----might be a good marriage here! ;)
  • imadmanimadman Member Posts: 4
    I knew I'd be back here soon enough. Looks pretty easy anything I need to know about changing the O ring in the fuel injector? Or is it more involved than just unhooking the fuel tube, taking out the injector inserting a new seal, hooking it back up bleeding the fuel filter for air and good to go? Thats way to easy for my luck!
  • shw64shw64 Member Posts: 1
    I have a 1983 300D and the windows will not work. I have checked the fuses and there is no power at the fuse clips. I contacted the local dealer and talked with the mechanic there. He found a book and it said there is a relay associated with the windows. He said it was behind the instrument cluster. On you tube it shows how to remove the cluster. I did that and the relay I was able to find, turns out, is for the windshield wipers. All this is according to the part number on that relay.

    Has anyone ever tried to find the power window relay, and if so, where is it. I did find 2 more relays under the hood, and the dealer said they were for the aux fan for the radiator and the power windows.

    So which is it. I wish there was a way to check the relays without buying new ones ($40 each) and just shotgunning it.

    Thanks for any help. Steve
  • burdawgburdawg Member Posts: 1,524
    Hmmmm.....If there is a relay I would think it would be on the load side of the fuse, not the supply side. If you put it on the supply side then the fuse won't protect the wiring in the event of a bad relay failure. Anyway, a wiring diagram is needed. It's possible there's a fusible link in that circuit that is open, or bad contacts in the ignition switch.
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    The fuse/relay box is located in the left side of the engine compartment.

    The window relay is marked #10. Bottom row, 4th from the right as you look at the box.

    There are TWO fuses for the windows, one for each diagonal set of 2 windows. These are marked A and B and are respectively on the extreme left, top row, and extreme left, bottom row, of the fuses/relays.
  • ossiesanossiesan Member Posts: 2
    Started doing research about diesel engines and they were meant to run on Peanut Oil! Is that feasable on older engines. thinking about getting a 1979 MBZ 300 CD.
    Opinions? Advice?
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    Actually the first diesels were run on palm oil.

    Yes you can run on various types of cooking oil but you'll need to do research on the proper conversion of the car and treatment of the oil itself. Also, if you live in a cold climate, you will undoubtedly need a dual - fuel system to get the car started. There's lots of info on the internet about this. Whether it is worth the time and effort is debatable, in monetary terms, but some people seem to really enjoy going through this process.

    You can also by-pass all this and just buy commercial biodiesel at the pump--but it is not cheap fuel,and you'll have to change out your two fuel filters after the first tank of biodiesel. On the positive side, no conversions or special equipment needed for commercial biodiesel.

    My personal opinion is that buying biodiesel at the pump is far more practical, unless you have lots of time on your hands and don't mind hauling around vats of used cooking oil, and processing it with various chemicals.
  • ossiesanossiesan Member Posts: 2
    thanks for the info.
  • benzsilverbenzsilver Member Posts: 21
    To shw64... a source of info I have also found to be helpful in many aspects of mb maintenance, repair, trouble shooting and general upkeep is Diesel Giant.com. :shades:
  • straxclastraxcla Member Posts: 1
    I was thinking about getting a 300d as a first car, 200-250k on it and I can only afford it to be around $2000. I was considering it because of style, long life and mpg. Is this a REALLY bad idea or a decent one? How easy are these cars to work on? What is the actual mpg? How fast can they go? I just want to know a little more about this type of car. Thanks
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    edited August 2010
    My Two Cents:

    I really don't think a high miles cheapo 300D is a good idea, no. I'd much rather see you get into a Turbo Diesel that has been very well cared for, and spend the extra $$$ to find such a car---because you'll be spending plenty of money trying to keep a high miles 300D that you paid $2000 for---it'll be a beater at that price and it's not a cheap car to fix.

    If you find a nice 300D, however, you must expect the non-turbo cars to be very...and I mean VERY....slow. Getting onto a freeway will be a white knuckle experience and climbing hills is a right-lane affair.

    Despite the outrageous claims you see on the Internet, I've driven enough of these cars for enough miles to state with some authority that around 20-24 MPG is the real world, with some occasional dips + or - a few MPG.

    I guess it all depends on your expectations. How high are they? If you want a fun hobby car, and you have extra money to spend and a bicycle for those days it won't run---then great, go for it and learn things that you might apply someday toward a newer and nicer diesel. This could be your "learner".

    But if you think a $2000 Benz diesel is going to "run forever", get "35 MPG", and "never needs repair", you're in for a bit of a letdown.

    True I did buy a clean 300D for $1500----but I put many hours and an additional $1500 (plus my own labor for "free") to make it a save, reliable everyday car.

    Areas to watch out for:

    1. Non-functioning AC/heat

    2. Non-functioning power windows (they break the regulators inside the door).

    3. Oil leaks

    4. Oil burning (hard to spot because of diesel smoke)

    5. Hard to Start --- if your diesel doesn't start RIGHT UP when cold, there's something wrong with it.

    6. Sagging rear suspension, rear wheels at weird angle--this is a worn hydro-pneumatic compensator

    7. Hard shifting transmission -- -normal, live with it.

    8. Car won't shut off---- vacuum leaks

    9. Extremely loud, clattery engine that won't quiet down when warmed up---engine is worn out probably

    10. Rust -- look in rocker panels, rear trunk area where spare tire sits.

    Good luck!
  • benzsilverbenzsilver Member Posts: 21
    You give me the impression that you like to tackle challenges. As Mr. Shiftright said, each and every area mentioned should be carefully considered as you begin your quest. However, for me, I purchased my first Benz that I could afford for $600.00 cash from an ad in one of the magazines you get at a corner gas/food mart.I had been dreaming of a Benz for a long time, when I moved to a rather affluent area of Houston, where every other car you saw in a driveway, parking lot or driving up the road was a Benz, my spouse said 'go for it' when I showed her the advertisement. I called the lot, they said it was still available, I said I'll be there by 2pm to pick it up. No, it was not the sl or coupe of my dreams, but a 4-dr sedan(230). It had six cylinders with single overhead cam, 2-2barrel carbs,standard shift 4 on the floor plus reverse, no a/c, no p/w, no s/r, painted hub caps. cloth seats. The idea of me owning a Benz blinded me of all the things the car did not have, I could not supress my appetite to drive that car home. So I shelled out $600.00 plus TT&L and giddily drove it a hot 20 miles home. It was also missing a muffler so it was also quiet loud with acceleration, but the car was so solid and pulled so positively, that I felt probably as good as any new owner of a Benz, be it new or used. It proved to be an educaional process and I did spend somemoney on it but the experience has left me with that thought the Benz commercials always end with" A MERCEDES BENZ WILL ALWAYS BE A MERCEDES BENZ.' So carry on with your quest and enjoy and treasure the experience. :shades:
  • fintailfintail Member Posts: 58,543
    Do you have a W110 230 or a W114 230?

    My story is similar to yours. When I was young, I had a little (literally) money and wanted my own car rather than driving spare family cars since my first car got hit. I had liked MB since I was a little kid, but never found one in my price range that was really roadworthy. Then one day I saw this sky blue fintail in a parking lot with a for sale sign in the window. I had seen the car around town for several years, always remembering the color and its sound condition. I called the owner and took it for a drive...and that was it, I had to have it. $1600 leaked out my wallet, and I was the proud teenaged old owner of a strange old car that needed some TLC, but was fully roadworthy. Fast forward through the years, through college and more, and I kept it as my everyday car. It needed some engine work a few years after I bought it, but I compared the price of doing the work to what kind of car I could get for the repair money...and had it fixed (piston ring broke, and the engine was generally tired). About a year after I was out of school, I had a good enough job where I could afford a newer MB...but I kept the old car. And I still have it, and it is still as nice to drive as ever. I haven't owned another marque since...once you've driven one for so many years, you get used to the feel. Like that British ad said..."A Used Mercedes is Still a Mercedes". There's still no brand of car I like more.
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