C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

Rough cold start

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Old Jul 20, 2007 | 08:24 AM
  #1  
benzoc230k's Avatar
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From: Oregon
05 C230K SS
Rough cold start

When I start the car cold the needle drops down like it's going to die then comes up and runs fine afterward. No check engine light either. Any clues guys?
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Old Jul 20, 2007 | 08:29 AM
  #2  
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On a few occasions during the extreme cold months, mine did the same thing. It would start up but the rpm drops and shakes but remains on. The m271 4-banger is known for rough starts in the morning...do a search. There have been several threads on this topic. If you're still under warranty, have it check by the dealer. Good luck.
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Old Jul 21, 2007 | 04:46 PM
  #3  
benzoc230k's Avatar
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From: Oregon
05 C230K SS
Thanks. I'll call the dealer about this issue.
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Old Oct 21, 2008 | 06:04 PM
  #4  
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From: Bangkok, Thailand
W124, W203, W204, W251
What did the dealer say?
I just bought my 05' and it has the exact same problem as yours when the weather is cold.
And a few week ago, it didn't start...it bumped up to 500rpm and just shuted off by itself.
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Old Oct 21, 2008 | 06:19 PM
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1996 MB E320 & 2010 Nissan Elgrand
Not sure if my case is the same as yours, but..

I've always got a squeaking cold start especially if I started the engine for the first time in one day. It started to squeak after I didn't drive/start the car for 3 months.

Went to a shop and I was told to spray some WD-40 onto the belt. I haven't done that tho since I think squeaking is almost gone now that I've driven my car prety much everyday
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Old Oct 22, 2008 | 10:59 AM
  #6  
Utahkompressor's Avatar
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From: Bangkok, Thailand
W124, W203, W204, W251
Not sure if my case is the same as yours, but..

I've always got a squeaking cold start especially if I started the engine for the first time in one day. It started to squeak after I didn't drive/start the car for 3 months.

Went to a shop and I was told to spray some WD-40 onto the belt. I haven't done that tho since I think squeaking is almost gone now that I've driven my car prety much everyday
I think that's just a normal superchager noise and I don't think you suppose to put WD-40 on the belt...it's gonna make the superchager lose pressure.

Where is the OP? I still need the answer.
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Old Oct 22, 2008 | 11:06 AM
  #7  
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Corrolla
dang where ya live??? is it cold already?? any Snow lately??
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Old Oct 22, 2008 | 12:32 PM
  #8  
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Originally Posted by nibo83
Not sure if my case is the same as yours, but..

I've always got a squeaking cold start especially if I started the engine for the first time in one day. It started to squeak after I didn't drive/start the car for 3 months.

Went to a shop and I was told to spray some WD-40 onto the belt. I haven't done that tho since I think squeaking is almost gone now that I've driven my car prety much everyday
Do not under any circumstances spray WD - 40 on the Poly V belt. It is petroleum based and will damage the belt - ultimately leading to failure. If you have to spray something on the belt then use belt dressing. The same stuff you sprayed on your squeaky old Chev fan belt. It is at least compatible with the rubber, synthetic rubbers etc used to construct the belt.
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