Just as I come up to my 60k km/36k mile service, the problem has come back. Not all the time. As it also happens when using the non-remote key, this is probably nothing to do with the remote. An old thread suggested that this may be indicating something to do with the alarm system. I now have another theory. This started to happen about the same time a leak started in the air line to the orthopedic seats. My new theory is that this leak is preventing something registering as closed that depends on full air pressure. Anyway, I'll get the dealer to fix the seat and see what happens.

Momo

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1990 500SL 65k km - until May 11 2004
2004 E320 4-Matic wagon
2004 CLK500 Cabrio from May 11 2004