I am looking at buying a 2006 C280 4-Matic and the memory seat switches on the top front of the drivers door all work but not on the passengers side. The owner says the car was broken into and only the switches on the side of the seat are supposed to work and the memory switches on the door panel were from another car. This sounds wrong to me. What's the story? Are there options where only the drivers side has these adjustments?