Shaking at Start
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2002 White C320
Shaking at Start
When i let my foot off of the brake, the car starts to shake until i get up some speed (like 5 mph). It does this when im coming to a complete stop also. So any time i am below 5 mph it starts shaking very noticeably.
I think the tranny's shot but if anyone else has this problem please let me know.
I think the tranny's shot but if anyone else has this problem please let me know.
Newbie
Joined: Dec 2006
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i've got the same issue with my 01 c320. no fault codes. the mechanic said the engine mounts looked fine. they suggested replacing the spark plugs and wires first. other possible problems might be the MAF sensor or the AT transmission oil needs changing. i've heard another fix where they updated/flashed the computer software. i'm taking it back to the mechanic next week. let me know what they find out with yours!
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Joined: Nov 2001
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From: Laguna Niguel, CA
MAF is the easiest cheapest thing to clean, just get CRC MAF sensor cleaner , remove it and clean it well (this should be part of maintenance every 40K miles or so). Many problems happen when the MAF wire gets dirty. Spark plugs and wires are not as likely, not on a C320 with 12 spark plugs, that would mean 2 plugs failed in the same cylinder although a hairline crack in the coilpack would cause early morning starting problems and rough idle. I would check fuel pressure (fuel pumps on those early W203's were problematic). Also check fuel injectors by disconnecting one at a time to see if the engine drops the same rpm for each. If one or two are not dropping by the same amount then they could be weak or clogged, another inexpensive solution, get a fuel injector cleaner kit, the kind that attaches to the fuel rail and you run the car on the contents of the can whilst the fuel pump fuse is pulled.
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Newbie
Joined: Nov 2006
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I had a similar problem (shook with the brake applied as well) and was fixed with a fuel injector cleaner. Gumout, $4.00, Schucks.
I bought a set of spark plugs (Bosch 4's) for $45. It's at 75k miles, so it's time to change them soon anyway.
I bought a set of spark plugs (Bosch 4's) for $45. It's at 75k miles, so it's time to change them soon anyway.
Super Member
Joined: Mar 2005
Posts: 797
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From: Southern Methodist University
2001 C320 (purple), 2002 BMW 540i
is it a sort of shuttering where it lurches forward a moment and then slows or lurches back a fraction of a moment, then lurches forward again for a moment...?
Newbie
Joined: Nov 2006
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No lurching. Just a hard idle or vibrations when the car is stopped---like if it were a manual transmission and you let off the clutch a little bit. Nothing violent or feel I should take it in, but it is noticable.
Super Member
Joined: Mar 2005
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From: Southern Methodist University
2001 C320 (purple), 2002 BMW 540i
You seem to be driving a bit differently than I am because when stopped, I brake with the left foot and rev the engine up to about 1500rpm with my right foot and release the brake while flooring it when the light turns, so the trip from 0-5 is too fast to even notice.
So, in order to start troubleshooting this, we need to know how you're driving.
Super Member
Joined: Mar 2005
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From: Southern Methodist University
2001 C320 (purple), 2002 BMW 540i
Plugs are supposedly 100k miles. To me that seems an awfully long time and I'd do it a little before then.
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From: Long Island
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