I just bought a new key for my 2000 ML 320 ........ is there a way of resetting the key or syncing it to unlock and lock the doors ???? I was told the only way to do it is to take it to a Mercedes dealer and pay $75 to $100 ..... there got to be another way , I read the manual and what they say doesn't work , the manual says if it doesn't work to take it to your nearest Mercedes Dealer , I just paid big bucks for the new key and now they want me to pay more to sync it ...........any ideas??? Thanks