One problem related to engine has been reported for the 2009 Mercedes Benz C Class. The most recently reported issues are listed below.
Bought a new 2009 c300 mercedes at a dealer in san diego. Car has rough idle and shakes for 30 seconds in the morning. Dealer checked and found nothing wrong. They are blaming it on strict emission issues as the source of the rough idle. Hood does not latch unless slammed hard. Dealer claimed they had adjusted latch but still the same.