I recently had a transmission shift control replaced on my 2001 CLK320 at a cost of some $2G. After a couple of days and driving the car for some 25 miles I could turn the engine off but was not able to remove the electronic key. So I started the car and took it back to the transmission shop to be checked. The next day they called and told me that the car wion't start any more and it will probably cost another $2000 to fix. Can anyone give me an idea of how to remove this key and what could be wrong with the ignition? I will be greateful.