On one of the Mercedes lists, George Murphy (I think?) posted a message some time ago about restoring proper operation of the alarm system on his wife's 300E. I'm having this same problem, that is the alarm will arm / disarm unreliably from the driver's door. I can find what should be done; that is - clean the locks with alcohol and re-lube with the proper MB stuff, but I can't find the details on how to clean the locks. Can anyone assist?
1986 300E 118.8 kmi