Dan, On my W126 500SEL, I can pull out the actual ash holder ( as one would to empty it ) and once this is removed, I can see 2 self tapping screws that attach the ashtray chassis to the lower panelling. I can then remove these 2 screws with a magnetic #2 Phillips driver then the ashtray chassis complete with wire harness for the lamp, can be pulled free. I am only guessing your 85 Euro will be the same . .