Sometimes when I start my car, the car jerks forward even though its in park. The first time this happend the car drove but it seemed like it did not go out of first gear. I parked the car and noticed that the P icon was not showing in the dashboard. I started to try and see what was wrong and finally I figured out that in order to get the icons to show and the gears to work normally, I turned off the engine when in N waited and put the gear back in P, then incerted and turned the key and IF I see the P icon I knew then that I can drive the car in its proper mode. This is happening more often now. What is wrong with this car? I just bought it from a Tampa Dealer who swore nothing was wrong with this car. His own mechanic said nothing was wrong with the car when we both went to his shop for a diognostic check.
any advice? Thanks Much....Evie

My car is a Mercedes C280 Sport year 2000
I have owned the car for 7 weeks