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Mercedes-Benz C-Class Maintenance and Repair



  • MrShift@EdmundsMrShift@Edmunds Posts: 43,647
    Well you could check your brake fluid reservoir first.
  • Vee56... If you determine the cause of the electrical draw, please let me know. Mine is at the MB dealership right now for the same exact problem. :sick: It's going to be sold as soon as it's repaired.
  • billp8billp8 Posts: 56
    Just spoke with my service advisor--the problem was leaking rear differential seals. Fortunately, I got the extended warranty. Thanks again!
  • Karen@EdmundsKaren@Edmunds Posts: 5,024
    A national newspaper is looking to interview consumers who have had to replace a car key, which ended up costing over $200 or $300. Please send an e-mail to no later than Monday, April 2, 2006 containing your daytime contact information, the cost to replace your key along with the make and model your vehicle.

    Chintan Talati
    Corporate Communications

    Karen-Edmunds Community Manager

  • ldiamondldiamond Posts: 2
    I have just come from the dealer and during another inspection of my audio system, they blew out 2 amplifiers and ended up replacing the head unit. They say this will fix my previous audio cutting out at random times problem.
  • tinsbytinsby Posts: 1
    Hello all,

    Has anyone experienced a vibration in a new C280 sedan starting about 42-45mph?

    Apparently MB knows about this because they recommend changing a shim under the rear end housing on the end that connects to the drive line. I am told by the dealer the car comes with a 4mm shim, but MB recommends changing it to a 2mm shim. In my case changing this shim to the smaller one only made the vibration worse.

    I can sit on the passenger side with someone else driving and I can tell them when the car reaches 45mph, its that obvious! Below 45 mph the car is wonderfully smooth around 50mph you don't feel it as much, but it's there; it's just the frequency of the vibration or resonance is higher.

    Needless to say I am disappointed with this in a brand new car, let alone a Benz. The dealer has ordered a new driveshaft for me in an effort to fix the problem, that has yet to arrive and be installed, so I don't know the outcome.

    Does anyone know if there was a TSB or a recall for this? If so what is the number of the TSB?

    The dealer says they have had it on other models too not just the C280. But if MB knows of it why do they keep building them so they vibrate? Oddly enough I drove another C280 with the same tires on it and lo and behold that one had the SAME vibration! This is clearly not acceptable.

    Thanks to all who reply, any help will be most appreciated.

  • I am now convinced that I have a wiring problem somewhere in my O2 Sensor System, but I would like to get some input from anyone who may have had the same problems as me.

    Now I have replaced both O2 Sensors twice now (the first two were under warranty.) I replaced my forward (upstream of the CAT) late last Summer. Then my check-engine light came on again indicating that the Rear (downstream of the CAT) was bad. i bought this right before Christmas but when I saw how it was buried, I had it installed at my next service, which was last week. Unfortunately my Check Engine Light is back on again and this time the Fault Code reads that it is a High Voltage issue with the Rear O2 Sensor. What the heck is going on? Has anyone been through these problems like me? Have you managed to fix them? If I ignore the light and O2 fault code, will I be damaging my Engine or Fuel Consumption? Any input from anybody will be extremely appreiciated.


  • Everytime I pull away from an engine shutdown and restart, unless I manually downshift from Drive to Two and then back to Drive, after the transmission has shifted up, I have to rev the engine upto approx 3,600RPM before the Transmission up-shifts. Now I have been told that my shifting is sensed by Vacuum and therefore I wonder if I have a sense line hose adrift or leaking (my car is a German made, 1996 model that came into the USA through Houston)? What are your thoughts on this matter, please anybody?


  • vee56vee56 Posts: 2
    Well! had the C320 serviced at MBZ of Oakland. They called to let me know the veh. was ready and they replaced the front seat "relays". I arrive at the dealership to p/u the car. The service mgr. recieved a call saying the car won't start and they are charging the battery. The Service Mgr. then offers to give me a rental car. They called me the next day and said they had located the problem. The battery was fried and they had to replace it, :( (3rd time)and now a week later I'm sitting here at home waiting for MBZ road service to come jump the car. Back to the dealer I go...will keep you posted :mad: :mad: :mad:
  • renyreny Posts: 4
    I bought my car in June 2005 and hadd no problems with it then in January 2006 I noticed alarm went of but it was going of quietly like the battery was low so MBZ road side assistant came and gave me a jump start and the next day it happened again so I went to MBZ dealer and bought a new battery and a few days later it happened again. I took to the dealer and thay say it was the wiring harness and kept my car there for 2 weeks and I still have the same problem. Is there anyone who has or had the same problem who can please help me out. :cry:
  • benz747benz747 Posts: 91

    I am getting Tape Stuck message and not able to eject tape from the unit. Any idea how to resolve this issue?

  • I am considering purchasing a 2003 C-240, I am concerned about extreme maintenance costs and if this a wise purchase
    at all. I had read several horror stories in relation to this vehicle, and I am afraid I may be taking on problems a previous owner may have had. What are some of the most common complaints with this model? Would I be better off purchasing a Toyota or Honda and save myself the headache?

  • schulhofschulhof Posts: 71
    You are almost certainly better off purchasing a Toyota or Honda. The only catch being is that then you have to drive around in a Honda or Toyota which is not as enjoyable as a Mercedes Benz! You need to sort out your priorities and tolerance for less than Toyota reliability.

    I recently purchased a new '06 C230. I have driven it 800 miles in about 2 months with no issues. It is a second car - I drive my Miata daily. I could afford the C230 but I certainly can't afford to drive it :blush:

    FWIW, 2003 seems to be right in the middle of the MBZ C Class quality lapse. According to much forum talk 2001-2004 were the "pit" and 2005+ may prove to be the turning point and return to quality.

    Time will tell.

  • tony24tony24 Posts: 15
    I hope that you don't buy the C240. I have had nothing but trouble since my purchase of my C240 in 2003. I know someone would probably reply to this message and say they don't have any problems with his or her car.
    It is not worth the problems that you will have. It is just not worth it.

    Take care
  • kwhytekwhyte Posts: 4
    I'm experiencing the same thing. We had the upstream sensor replaced in March and only yesterday I had another Engine light. Seems as if it's the same thing. I can feel a fluctuation in the revs as the engine compensates. Ity cost me 35o Euros the last time for 5 mintes work. Any idea if I can do it myself?
    We're in the process f buying a new car but certainly not a Mercedes again. It's been the most expensive car to run. It has had more costs in the garage in 5 months that we have used in petrol. A taxi to work would be cheaper
  • jamie7jamie7 Posts: 3
  • jamie7jamie7 Posts: 3
  • cneffcneff Posts: 65
    I had the same issue with my '04 C320 4matic wagon

    Few things to check...

    > Tire pressure and old tires - soft tires can make the car sloppy
    > Bad Alignmemt...can cause the car to pull left or right, like it is floating and dart suddenly side to side over bumps.
    > Bad Anti-sway bar.. car can feel loose

    I did the whole routine... new tires, 4 wheel alignment and they found a bad anti-sway bar (under warranty)

    Now the car drives true

    Good luck
  • jamie7jamie7 Posts: 3
    nice one, already done tires but anti-sway bar sounds possible car is under warranty as well ill book it in many thanks
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