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Old 02-03-2008, 06:42 AM   #1 (permalink)
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Exclamation My Car Accelerates By Itself

Hi, I have a 1991 Mercedes C-280 German Spec Automatic and it has the tendency to accelerate on its own. I have to slam my foot on the break or it will keep going, often once I have removed my foot from the break, it does the same thing. I was wondering if any of you knew what might cause this. It is very annoying! Thanks
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Old 02-03-2008, 07:39 AM   #2 (permalink)
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sounds like a cruise control problem to me possibly?
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Old 02-03-2008, 07:51 AM   #3 (permalink)
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It's also very dangerous

You need to report this to the NHTSA as a dangerous defect. Your accelerator cable is sticking. Happened to me on the ML430 about a month ago. I geared it down while aggressively applying the brakes to stop. It hasn't happened again but it could at any time.
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Old 02-03-2008, 08:15 AM   #4 (permalink)
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Thanks

Hi, Thanks for your information. I actually live in Germany so I would not know how to report it but thank you. It is not a cruise control problem, as I do not have a cruise control. Is this something that I could have fixed if it is what you say? My husband is deployed and he normally deals with these types of things. I just do not want to be ripped off any information would be great. Thanks again.
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Old 02-03-2008, 09:32 AM   #5 (permalink)
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It may be a weak throttle body return spring, or some part of that mechanism may be sticking. Or, your car may just wanna GO!
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Old 02-03-2008, 10:09 AM   #6 (permalink)
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Well there are speed limits on the Autobahn despite what my car thinks! Thanks for the input it is all wonderful, thank you so much. I told my husband what I put and he said that I needed to explain a little better the problem. What happens is when I am driving the accelerator literally compresses itself and speeds up, this can happen if I have been driving for an hr with no problem. I then have to put my breaks otherwise it will literally speed up (I let it get to 170 once!) I am not trying to fix it myself I just don’t want to be ripped off, as a woman alone in a foreign country I have sucker written all over my face!!!
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Old 02-03-2008, 11:18 AM   #7 (permalink)
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This must be a W202 car, a long time ago when I had one, but it was a diesel (surprise). It should have an electronic accelerator with some basic diagnosis support, including fault codes. Reading the codes could help.
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