my car was towed to a Mercedes garage and was diagnosed with a bad key and switch. they said it would cost $1600 to replace. I couldn't afford it so I went on E-bay and bought an ignition switch and key, the shifter console and a control module, I think. They came off a compatible car. Will they work after installation or what would I have to do to get them programmed, if possible? Please, anyone! It is a 2000 mercedes, E320.