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Cars Q&A

In the morning when the engine is cold, the car idles well for about 5 seconds with RMP steady. Then the RPM dips and idling becomes very slow and rough causing the cabin to vibrate (shaking the cabin). It can be best described as backfiring situation. Then, 20 seconds or so, the car goes back to normal. This is a 2010 300 SLK, and according to the computer of the service at the dealership, every thing is fine. Can you help?
By Ali Azad 07 July 2010
Expert`s comment:

This type of problem arise due to fault in fuel supply system.There can be malfunctioning of sensors also.

Answer by Shiva Shankar 07 July 2010
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