Go Back  MBWorld.org Forums > Mercedes-Benz Sedans > C-Class (W204)
Car shakes in cold engine >

Car shakes in cold engine

Notices
C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

Car shakes in cold engine

 
Old 10-16-2012, 07:14 PM
  #1  
Newbie
Thread Starter
 
Join Date: Oct 2012
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
2010 C300
Car shakes in cold engine

I bought a 2010 C300 certified (20k miles) as a gift to my dad for about two months ago and ever since then, we went to the service three times. I had so many problems with it, but there is one issue that they kept saying they couldn't duplicate it.

Whenever the car starts in the morning (in cold engine), after about 5 sec, car shakes a lot for 3-5 sec. It's very noticeable, but the dealer kept saying it's normal that the car shakes in a cold engine.
I really don't think this is a normal.

Any idea what is causing it?
Perhaps, the previous owner used non-premium gas???

HELP! Please!!! I am getting frustrated

++++
Also, this is another issue we found. It doesn't happen all the time, but some times when he goes above 75mph or higher and let goes the gas pedal, speed decreases rapidly. Any idea why?
Thanks!!
erin027 is offline  
Old 10-16-2012, 07:27 PM
  #2  
MBWorld Fanatic!
 
jctevere's Avatar
 
Join Date: Sep 2009
Location: Dix Hills, New York
Posts: 2,108
Likes: 0
Received 3 Likes on 3 Posts
2012 C250 Coupe
It is indeed normal. This is because the lifters are activated when it is cold out - keeping your idle RPM's artificially high to warm up the engine and catalytic converters. You will notice that it is up above 1,000 RPM's when you feel this, and then the issue goes away when the lifters settle and the RPM's idle at their normal 750-900 ish range.

As far as the "rapid" decrease in speed, rapid is a subjective thing. Hard for us to say... Perhaps the engine downshifts as you let off the throttle (which slows the car down more) as the car predicts you're wanting to stop or slow down. It could also just be that the car you previously had "coasted" much easier?
jctevere is offline  
Old 10-16-2012, 08:30 PM
  #3  
Newbie
Thread Starter
 
Join Date: Oct 2012
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
2010 C300
Originally Posted by jctevere View Post
It is indeed normal. This is because the lifters are activated when it is cold out - keeping your idle RPM's artificially high to warm up the engine and catalytic converters. You will notice that it is up above 1,000 RPM's when you feel this, and then the issue goes away when the lifters settle and the RPM's idle at their normal 750-900 ish range.

As far as the "rapid" decrease in speed, rapid is a subjective thing. Hard for us to say... Perhaps the engine downshifts as you let off the throttle (which slows the car down more) as the car predicts you're wanting to stop or slow down. It could also just be that the car you previously had "coasted" much easier?

Thanks for the reply.

Two things. The shakiness is not just a small shake. The whole car shakes. Compare to the loaner car it's about 3times. Is it still normal for mercedes?

Also, the speed decrease issue.... it's the point where I almost had an accident.
Does anything has to do with using non-premium gas??

Thanks again!
erin027 is offline  
Old 10-16-2012, 08:44 PM
  #4  
Member
 
aMsupp's Avatar
 
Join Date: Jul 2011
Posts: 87
Likes: 0
Received 0 Likes on 0 Posts
C300 Sport
Originally Posted by erin027 View Post
Thanks for the reply.

Two things. The shakiness is not just a small shake. The whole car shakes. Compare to the loaner car it's about 3times. Is it still normal for mercedes?

Also, the speed decrease issue.... it's the point where I almost had an accident.
Does anything has to do with using non-premium gas??

Thanks again!
I don't have any shakiness on cold starts... ever. I've had the car a year and a half and in temperatures around 0 F... sounds messed up.

As far as your deceleration issue... have you mentioned this to the dealer?

Also, was your car a CPO (Certified Pre Owned)? Did you buy it from a MB dealer?
aMsupp is offline  
Old 10-16-2012, 09:41 PM
  #5  
Senior Member
 
Join Date: Oct 2012
Location: Wichita
Posts: 364
Likes: 0
Received 0 Likes on 0 Posts
2011 C300 4MATIC
Yes, non-premium gas WILL cause the shaking. You MUST use premium gas in a Mercedes or you will run into too many problems.
aamirani is offline  
Old 10-16-2012, 09:43 PM
  #6  
Senior Member
 
Join Date: Oct 2008
Posts: 397
Likes: 0
Received 0 Likes on 0 Posts
2010 C300
my car shakes too for like 3-5 seconds. i dont see it as a big deal... it's just trying to warm up
victort is offline  
Old 10-16-2012, 11:03 PM
  #7  
Newbie
Thread Starter
 
Join Date: Oct 2012
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
2010 C300
Originally Posted by aMsupp View Post
I don't have any shakiness on cold starts... ever. I've had the car a year and a half and in temperatures around 0 F... sounds messed up.

As far as your deceleration issue... have you mentioned this to the dealer?

Also, was your car a CPO (Certified Pre Owned)? Did you buy it from a MB dealer?
It's Certified car that I bought two months ago from MB dealer (Fletcher Jones in Newport, CA). It's 2010 C300 with 20,000 milages on it. I mentioned the issue and I am brought the car in four times in last two months with other issues, but they couldn't fix the shakiness and deceleration because they kept saying they couldn't duplicate the issues.

I don't know what else to do. I use premium gas only but I can't do anything if the previous owner used non-premium gas before.

I am considering to see the lawyer if they can't fix this issues.
erin027 is offline  
Old 10-16-2012, 11:36 PM
  #8  
RLE
MBWorld Fanatic!
 
RLE's Avatar
 
Join Date: Feb 2004
Location: SEATTLE WASHINGTON USA
Posts: 3,986
Likes: 0
Received 0 Likes on 0 Posts
'08 C300 Lux Barolo Red Beige Leather P2 MM 18" wheels '84 944
Originally Posted by jctevere View Post
It is indeed normal. This is because the lifters are activated when it is cold out - keeping your idle RPM's artificially high to warm up the engine and catalytic converters. You will notice that it is up above 1,000 RPM's when you feel this, and then the issue goes away when the lifters settle and the RPM's idle at their normal 750-900 ish range.

As far as the "rapid" decrease in speed, rapid is a subjective thing. Hard for us to say... Perhaps the engine downshifts as you let off the throttle (which slows the car down more) as the car predicts you're wanting to stop or slow down. It could also just be that the car you previously had "coasted" much easier?
This post just flat amazes me. Where on earth did you ever come up with "the lifters are activated when it is cold out?" The lifters "settle?"

You need to delete your entire post since it is technically a fantasy.
RLE is offline  
Old 10-17-2012, 02:38 AM
  #9  
Super Member
 
Domm's Avatar
 
Join Date: Mar 2012
Location: San Francisco
Posts: 591
Likes: 0
Received 0 Likes on 0 Posts
'08 Mercedes C300
You can search "tcu reset" for the deceleration issue you mentioned.
Domm is offline  
Old 10-17-2012, 10:58 AM
  #10  
Member
 
aMsupp's Avatar
 
Join Date: Jul 2011
Posts: 87
Likes: 0
Received 0 Likes on 0 Posts
C300 Sport
Originally Posted by erin027 View Post
It's Certified car that I bought two months ago from MB dealer (Fletcher Jones in Newport, CA). It's 2010 C300 with 20,000 milages on it. I mentioned the issue and I am brought the car in four times in last two months with other issues, but they couldn't fix the shakiness and deceleration because they kept saying they couldn't duplicate the issues.

I don't know what else to do. I use premium gas only but I can't do anything if the previous owner used non-premium gas before.

I am considering to see the lawyer if they can't fix this issues.

I might be going out on a limb here... but your "deceleration" issue doesn't happen ALL the time, right? I can honestly say that the car's blinker takes some getting used to because the cruise is set right there above it (where most cars have their blinker). Do you think he may have hit the cruise to set at a certain speed (thinking he was hitting the blinker), then sped up the car? When he releases the gas it will try and go back to what the car's cruise speed was set to, and it will hit the brakes in order to do so (rapid deceleration).

I'm still uncertain about your shakiness on cold starts. But it is still under warranty and may be worth pursuing legal action if they continue to ignore the problem and say they could not replicate it.

Last edited by aMsupp; 10-17-2012 at 11:03 AM.
aMsupp is offline  
Old 10-17-2012, 11:11 AM
  #11  
Newbie
Thread Starter
 
Join Date: Oct 2012
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
2010 C300
Originally Posted by aMsupp View Post
I might be going out on a limb here... but your "deceleration" issue doesn't happen ALL the time, right? I can honestly say that the car's blinker takes some getting used to because the cruise is set right there above it (where most cars have their blinker). Do you think he may have hit the cruise to set at a certain speed (thinking he was hitting the blinker), then sped up the car? When he releases the gas it will try and go back to what the car's cruise speed was set to, and it will hit the brakes in order to do so (rapid deceleration).

I'm still uncertain about your shakiness on cold starts. But it is still under warranty and may be worth pursuing legal action if they continue to ignore the problem and say they could not replicate it.
Thank you for your reply.
Yeah, I think I will see the lawyer soon if they can't fix the shakiness.
erin027 is offline  
Old 12-25-2013, 10:02 PM
  #12  
Senior Member
 
Join Date: Oct 2009
Location: So Cal
Posts: 321
Likes: 0
Received 0 Likes on 0 Posts
2010 C300 & 2014 E350
Any updates on this? My car does the shaking on cold start too.
2006_C350 is offline  
Old 12-26-2013, 08:51 AM
  #13  
Super Moderator
 
Glyn M Ruck's Avatar
 
Join Date: Jun 2008
Location: Llandudno, Cape Town, South Africa
Posts: 19,905
Received 95 Likes on 78 Posts
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
The car decelerates rapidly when lifting off because the Torque Converter is locked up. These cars don't free wheel. This is not an old US slush box. Don't lift off if you don't want the car to slow down. TC lockup is for efficiency reasons. These cars run against compression almost like a manual.

The M272 engine should not shake excessively on cold start, high idle, full open loop enriched running. Some of this can depend on just how cold it is & fuel used. i.e summer or winter grade.

However, the M272 uses very soft silicone fluid filled mounts. Some shake is inevitable until stable idle but you should not feel it inside the car.

Don't touch the throttle at cold start. Just crank the car.
Glyn M Ruck is offline  
 

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Car shakes in cold engine


Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: