My 1993 300E2.8 has developed a strange problem. Unlocking the driver's side door from the outside with the key unlocks all the other locks (including trunk and fuel filler flap) but will not disarm the alarm, and I have to walk around to the passenger side to unlock that door to disarm it.

This used to be just a winter problem which went away with the warmer weather, but it's continued into the summer this year and is getting really old.

Plus, the driver's door doesn't unlock when I unlock the passenger door (but the alarm is disarmed.) This means that I'm always making at least one trip around the car to open all the doors and turn off the alarm, unless I reach in and lift the driver's door lock stalk.

Does anyone have any idea as to what's going on?

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Steven Harrison

1993 300E2.8 - 196K
2001 E320 4MATIC - 86K