Odd central locking malfunction + dome light?
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Junior Member
Joined: Dec 2004
Posts: 15
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From: Houston, TX
1992 400SE, 1997 S500 Coupe, 2019 C300 4MATIC
Central locking malfunction affecting dome light??
Recently my ‘97 S500 coupe’s central locking started acting up. Red & green lights are working but that’s it - nothing else responds to the key fob. From inside when using the locking switch on the dash again the locks don’t respond, however…pressing the lock switch repeatedly causes the dome light to flash! Very odd.
Even stranger, if I turn on the dome light and then try the door lock switch I hear some something running (sounds like the vacuum pump?). But still the door locks don’t move.
In addition, the window pop-down doesn’t work correctly when opening/closing the doors.
Anyone know what the connection is between central locking system and the dome light circuit?
Desperately wanting to find the culprit!
Even stranger, if I turn on the dome light and then try the door lock switch I hear some something running (sounds like the vacuum pump?). But still the door locks don’t move.
In addition, the window pop-down doesn’t work correctly when opening/closing the doors.
Anyone know what the connection is between central locking system and the dome light circuit?
Desperately wanting to find the culprit!
Last edited by jawsplace; Jan 15, 2023 at 09:21 AM. Reason: Spelling
