One problem related to horn assembly has been reported for the 2009 Mercedes Benz C300. The most recently reported issues are listed below.
I have had my 2009 Mercedes Benz C300 for 5 months now it was a birthday present on 7/11/15. I drove to the gas station filled it up put the key in the ignition it was dead. The lights and interior lights came on and the radio but the windows would not let down the horn would not blow and sunroof doesn't work towed it to Mercedes Benz arlington texas it will cost me 1,386 for repairs plus a 290. 00 diagnostic fee I just paid the 575. 00 carnot I have not even had a chance to have fun in it is has 49,000 miles on it and my warranty doesn't cover any of the repairs I need my money back what a rip off I only drive it on sat. And sun. Mercedes please do the recall this is bad business ethics for Mercedes Benz owners across the globe how you going to make us fall in love with our cars then punish us for it in the end that's obsurd and just down right wrong I am outraged about this year's birthday gift and now my christmas is going to Mercedes Benz 1,386 merry christmas Mercedes Benz I know your families will have a wonderful christmas by taking my family's christmas money away from us no christmas specials on service charge for repairs for new customers this year or nothing.