I just found an IR remote from my last 96 S420 that I sold 2 years ago. Is there any way to make the remote work to open the doors and trunk for my 97 S500. The part number on the 96 remote is identical to the one on the 97. I tried the steps listed in the owners manual (pressing remote then turning the ignition swithch with the key within 30 sec) without success.

Is this something a dealer can do or am I SOL?