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A Dead Battery Stops Even the Most Powerful - 2005 Mercedes-Benz CL65 AMG Long-Term Road Test

Edmunds.comEdmunds.com Posts: 10,059
edited June 2014 in Mercedes-Benz
imageA Dead Battery Stops Even the Most Powerful - 2005 Mercedes-Benz CL65 AMG Long-Term Road Test

We parked our 2005 Mercedes-Benz CL65 AMG for a few days and suffered a dead battery as a result.

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Comments

  • bankerdannybankerdanny Posts: 1,021

    I'm sorry, I can't think of a single reason why two alternators should make a difference (although obviously it did). The heavy duty alternator in that truck should have had more than enough juice to turn the car over.

  • mercedesfanmercedesfan Posts: 365

    It's kind of funny, almost this exact same series of events (well, he went from the airport to work, but close enough) happened to a business associate of mine with his Bentley Continental GT. 12-cylinder engines require a LOT of cranking amps to get going and they destroy batteries if they have slipped slightly out of spec.

  • Mr_ShiftrightMr_Shiftright Sonoma, CaliforniaPosts: 64,490

    Gee, a 9 year old German luxury car out of warranty--what could possibly go wrong?

  • dgcamerodgcamero Posts: 148

    Should have called Mercedes instead of your tow service...it's free for life for any Mercedes.

  • lime679lime679 Posts: 38

    We had this problem with our S65. Would leave on holiday and come back to find it dead. We finally figured out what was happening. The DVD rom for the GPS runs continuously regardless of the status of the vehicle (on or off). If you drive it frequently, you don't notice. But leave it sitting a few days and I guarantee it will drain.

  • 7driver7driver Posts: 145

    @bankerdanny, I can't tell how they hooked everything up, but I suspect the doubled up cables probably helped more than the doubled up alternators.

  • s197gts197gt Posts: 486

    i'm with you. i've jumped a ton of cars and the only issue i've found is when the cables aren't making a good connection. i never have to wait and let it sit if the connection is good. just being clamped on doesn't mean a good connection is made, sometimes you got to jiggle them a bit. good cables help.

    @bankerdanny said:
    I'm sorry, I can't think of a single reason why two alternators should make a difference (although obviously it did). The heavy duty alternator in that truck should have had more than enough juice to turn the car over.

  • hybrishybris Posts: 365

    I can't help but chuckle to myself when someone breaks out some cheap 16 gauge jumper cables and wonder why it doesn't work the first time. I use some home made jumper cables made from 1/0 AWG welding wire and I have yet to find a vehicle that I usually can't jump the first time assuming I have good connection.

  • ttopjohnttopjohn Posts: 25

    I don't recommend jump starting (or quick charging the battery when it is installed in the car) modern german cars with complex electrical systems. Or really any modern cars for that matter - either remove the battery and charge it or simply throw a new battery in. 4 years is great, I replace the battery in my 01 740 every two years.

  • evodadevodad Posts: 135

    jesus ttopjohn, every 2 years for a battery, my original battery went 6 years in my car

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