2011 C250 CGI Coupe - Shuddering engine only on cold starts.
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Mercedes-Benz C250 CGI Coupe
2011 C250 CGI Coupe - Shuddering engine only on cold starts.
Hi everyone. New member here.
I have a 2011 1st production run MB C250 CGI coupe. Only a few weeks ago, it began to shudder after starting cold. The shudder is felt in the cabin. It happens when the engine drop revs, e.g. 1.2-1k or 1-0.9k. The engine would also hesitate when dropping revs and bounce back up, e.g. 1.1-0.9-1-1.1-0.9 and this causes the shudder. I popped the hood to have a look this morning and could see the engine shaking quite a bit when this happens.
I have taken it back to dealer and they only did a software update and could not get any error codes. Very hard to get a cold start at the dealer even after 8hours of engine off.
Thanks heaps in advance.
I have a 2011 1st production run MB C250 CGI coupe. Only a few weeks ago, it began to shudder after starting cold. The shudder is felt in the cabin. It happens when the engine drop revs, e.g. 1.2-1k or 1-0.9k. The engine would also hesitate when dropping revs and bounce back up, e.g. 1.1-0.9-1-1.1-0.9 and this causes the shudder. I popped the hood to have a look this morning and could see the engine shaking quite a bit when this happens.
I have taken it back to dealer and they only did a software update and could not get any error codes. Very hard to get a cold start at the dealer even after 8hours of engine off.
Thanks heaps in advance.