My master key will not fit into the lock on my 1988 420SEL to disable the alarm! Anyone ever experienced this problem? It just baffles me! I have disabled the alarm by inserting the MS key in the trunk lock to disable alarm. Today it just will not work! Any help is appreciated. Thanks - blajj.

The key is probably worn.

Since you are in Maryland, head over to Euro Motorcars in Bethesda or Germantown (or whatever dealer is closest to you) and order a new key. You will have it before the weekend. Costs about $20.00.

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2001 E430 4matic
122,xxx miles
Black/Charcoal Interior

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Gone but not Forgotten:
1995 E320, 252,xxx miles, Black/Grey
1989 260E, 223,00 miles, Black/Black