engine shaking @ cold start...
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From: California
2014 C250 sport
engine shaking @ cold start...
When I started my car this morning, I noticed that the engine was randomly "shaking" during the high rpm warm up routine. This is the first time I noticed these random shakes...it feels like the engines moving side to side. This is the first car I had that takes a long time to cool down, sometimes if the car sits over night it still will have a normal, warm start start-up. My old S40 would do the high-rpm thing if it sat for more than an hour or so. Any comments are appreciated 
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When I started my car this morning, I noticed that the engine was randomly "shaking" during the high rpm warm up routine. This is the first time I noticed these random shakes...it feels like the engines moving side to side. This is the first car I had that takes a long time to cool down, sometimes if the car sits over night it still will have a normal, warm start start-up. My old S40 would do the high-rpm thing if it sat for more than an hour or so. Any comments are appreciated
I just bought my c300 two weeks ago and it does the same exact thing on a cold start
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Joined: Jun 2008
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From: Long Island, New York
2019 GLA 250 - I am in purgatory right now...
My car does alot of bizzar stuff when I start it. I LOL when somone posted that there C300 thinks it's a 7 Liter power stroke desiel for the first 3 seconds when it starts - because that's exactly what I was thinking. 15K now and no problems otherwise. I just accept it...
RickP
RickP
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'08 C 300 Sport, '01 SL 500 & '08 Nissan Frontier SE Crew Cab 4WD
My car does it too! and the exhaust sounds extremely throaty for some reason also while this is going on. Mine only lasts for about 10 seconds then goes away and is really smooth.
-Ryan
-Ryan
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From: Chesapeake, VA
'08 C300W Lux
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92 C230
I bought a 2010 C300.. I have so many problems with it. It shake in the morning, I develop a backache when driving more than 20 minutes, the car is not smooth and feels every bump in the street, Overall, I am not happy..
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From: Dix Hills, New York
2012 C250 Coupe
^ Try lowering your air pressure or something, I have found that the w204 has very comfortable suspension compared to competitors.
As far as shaking, mine does this too, I find its not as bad when you use 0-w40 Mobil 1 oil, and doesn't happen as much, but it still occurs. Still normal and ok @ 40k miles. Also, I notice that the RPM's "vary" as in the needle bounces, even at a contant speed on a straight slope. It is even more "audible" and can hear the variance since I got my exhaust done.
As far as shaking, mine does this too, I find its not as bad when you use 0-w40 Mobil 1 oil, and doesn't happen as much, but it still occurs. Still normal and ok @ 40k miles. Also, I notice that the RPM's "vary" as in the needle bounces, even at a contant speed on a straight slope. It is even more "audible" and can hear the variance since I got my exhaust done.
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From: Acapulco Mexico
2010 C300 Sport
Strange. My 2010 C300 is so quiet and smooth on startup I make it a point to pay attention to the tach just to make sure the engine is running. Which is disconcerting, as the tach itself takes a couple of seconds to wake up.
As for the shaking, one would suspect an injector fault. A check for error codes would show this defect. Engine mounts - is it possible that different assembly lines source the mounts from various suppliers? Shaking during cold weather starts, if not the injectors, would indicate defective mounts, as the rubber is harder and should support the engine more firmly at lower temperatures.
As for the shaking, one would suspect an injector fault. A check for error codes would show this defect. Engine mounts - is it possible that different assembly lines source the mounts from various suppliers? Shaking during cold weather starts, if not the injectors, would indicate defective mounts, as the rubber is harder and should support the engine more firmly at lower temperatures.
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From: SEATTLE WASHINGTON USA
'08 C300 Lux Barolo Red Beige Leather P2 MM 18" wheels '84 944
Shaky?
It's a defect but if you want to live with it, well then..................
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From: Puerto Rico
C300 Sport
Mines did the same thing after a month of purchased. I truly panicked thinking it was something really bad. Called the service advisor and told me that was completely normal. In my case the shake last probably from 3 to 4 seconds then go smooth. Only happens in the mornings (cold start).
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From: Dix Hills, New York
2012 C250 Coupe
But for people who park outside or in the cold, this is normal to have RPM's increase at start up and for some uncomfortable shaking.
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Mercedes c200 CGI 2012
I am just surprised of the number of people who are facing the same issue of the engine shake as mine does the same.
when im starting my engine on a mid cold temperature most of the times it starts shaking like a holy coaster even the passengers can feel it and after visiting the dealer several times a sensor has been changed and it is still there and at last i was told its a fuel injection issue and advised me when i check in for my 45000 k service to mention the issue so next week im checking in as im 500 k away from , also on rough idle i have a vibration .. Any how on a conclusion mercedes disappointed me
when im starting my engine on a mid cold temperature most of the times it starts shaking like a holy coaster even the passengers can feel it and after visiting the dealer several times a sensor has been changed and it is still there and at last i was told its a fuel injection issue and advised me when i check in for my 45000 k service to mention the issue so next week im checking in as im 500 k away from , also on rough idle i have a vibration .. Any how on a conclusion mercedes disappointed me
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2009 C300 4Matic
^ you likely have a motor mount issue. Try shifting from park into reverse or drive, if its motor mounts the shaking should get substantially more aggressive once there is load on the powertrain.
This can also happen on cold start as the engine high idles to 1500rpm or so which produces similar load to that of transmission engagement.
This can also happen on cold start as the engine high idles to 1500rpm or so which produces similar load to that of transmission engagement.
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Joined: Apr 2014
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Mercedes c200 CGI 2012
^ you likely have a motor mount issue. Try shifting from park into reverse or drive, if its motor mounts the shaking should get substantially more aggressive once there is load on the powertrain.
This can also happen on cold start as the engine high idles to 1500rpm or so which produces similar load to that of transmission engagement.
This can also happen on cold start as the engine high idles to 1500rpm or so which produces similar load to that of transmission engagement.
What i believe this is a defect in all mercs by the factory as it is not logical to have this similar issue by this amount of ppl, also the engine mount is not just something normal to have it replaced while the car is still one to two years old.
The shake starts when rpm goes down to 700rpm where the rpm needle starts to shake , also the engine light comes up from time to time.
Im gonna bring it up next time i check in the car into service and i hope to figure it out before my warranty ends.
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From: British Columbia
2011 E350 4 Matic
Thanks for the input .
What i believe this is a defect in all mercs by the factory as it is not logical to have this similar issue by this amount of ppl, also the engine mount is not just something normal to have it replaced while the car is still one to two years old.
The shake starts when rpm goes down to 700rpm where the rpm needle starts to shake , also the engine light comes up from time to time.
Im gonna bring it up next time i check in the car into service and i hope to figure it out before my warranty ends.
What i believe this is a defect in all mercs by the factory as it is not logical to have this similar issue by this amount of ppl, also the engine mount is not just something normal to have it replaced while the car is still one to two years old.
The shake starts when rpm goes down to 700rpm where the rpm needle starts to shake , also the engine light comes up from time to time.
Im gonna bring it up next time i check in the car into service and i hope to figure it out before my warranty ends.
for your issue i would just have your camera ready and take some video and sound clips as evidence
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From: California
w212 E350 Bluetec & Mk7 GTI Sport
"Thanks for the input .
What i believe this is a defect in all mercs by the factory as it is not logical to have this similar issue by this amount of ppl, also the engine mount is not just something normal to have it replaced while the car is still one to two years old.
The shake starts when rpm goes down to 700rpm where the rpm needle starts to shake , also the engine light comes up from time to time.
Im gonna bring it up next time i check in the car into service and i hope to figure it out before my warranty ends."
No defect. Its just a method of the car getting itself ready to go. Mine does it from time to time irrespective of the temperature of the weather or the car.
Motor mounts are all user error. You could ruin them in one day if you drive badly and carelessly.
If it only rumbles temporarily while turning on, and a few moments after its totally engineered to do so.
Similarly, people complain of brake rumble when sitting still at a light or something after driving; Its simply a brake cooldown process the car does and it makes people feel uncomfortable. It only does taht dependent on weather and the stress on the brakes that day. Keeping them fresh.
my dads sold mercedes for a long time
My dads had people complain of both of these things and they do not relate to any engienr trouble. however, people do often misdiagnose health symptons the same way they do car symptons. Alot of problems sound or feel the same as symptoms related to many categories of issues.
What i believe this is a defect in all mercs by the factory as it is not logical to have this similar issue by this amount of ppl, also the engine mount is not just something normal to have it replaced while the car is still one to two years old.
The shake starts when rpm goes down to 700rpm where the rpm needle starts to shake , also the engine light comes up from time to time.
Im gonna bring it up next time i check in the car into service and i hope to figure it out before my warranty ends."
No defect. Its just a method of the car getting itself ready to go. Mine does it from time to time irrespective of the temperature of the weather or the car.
Motor mounts are all user error. You could ruin them in one day if you drive badly and carelessly.
If it only rumbles temporarily while turning on, and a few moments after its totally engineered to do so.
Similarly, people complain of brake rumble when sitting still at a light or something after driving; Its simply a brake cooldown process the car does and it makes people feel uncomfortable. It only does taht dependent on weather and the stress on the brakes that day. Keeping them fresh.
my dads sold mercedes for a long time
My dads had people complain of both of these things and they do not relate to any engienr trouble. however, people do often misdiagnose health symptons the same way they do car symptons. Alot of problems sound or feel the same as symptoms related to many categories of issues.
