 I purchases a new SLK 350 and started having problems with it within the first 3000 miles. The oil sensor was faulty and then after being in the shop 8 days I got the car back and the  sensor receiver went bad.  then electronics module went bad twice, crank shaft sensor went bad, Car stopped because of electrical bug and had to be towed. Steering wheel spring sensor went bad. Navigation system had to be replaced.  Don't buy this car as the reliability is horrible. This car is constantly in for service.