Keys must be purchased and programed through MB. Anything else is a paper weight.

I forget where the cut off is, but, some earlier DAS used some key battery power in the security handshakes required to start the car. I think that was with the metal blade keys. By 98-99 the key was fully electronic (no blade) and the battery was only used to power the signal to lock/unlock the doors, etc.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)