I had an Avital remote starter/keyless entry unit put in my '88 300TE, and it needed an extra Mercedes-specific module so as to interface with the vacuum locks.

It now works like a charm.

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"If God had meant for us to walk, why did he give us feet that fit car pedals?" Sir Sterling Moss

Michael
2014 E63S Estate
2006 SLK55
1995 E500
1986 Porsche 944 turbo