E430 door lock problem
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Joined: Oct 2008
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ML430
E430 door lock problem
I have an E430 sedan that the door lock in driver's door locks and unlocks itself driving down the road. Sometimes happens on a turn. Also noticed radio will change stations on it's own too. Any suggestions?
MBWorld Fanatic!
Joined: Jan 2004
Posts: 5,939
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From: Seattle WA
99 E320
- use the SEARCH function. the issue with door locks doing the pogo act is
common with E models
- to isolate/eliminate the most common source, tape a penny opposite the
door pin. when the door closes it should (with penny pressing the door pin)
press the switch deeper, thus ensuring that the circuit is open (ie not
completing a circuit).
when the door pin is marginally about to fail, and with door closed, there is
enough play in the door switch/pin, plus road vibrations...that it believes the
door is open, thus closing the light circuit...activating the logic command to
unlock the door, and even possibly turning on the interior light.
- fortunately, the door switch/pin is roughly $20 part and an easy R&R.
common with E models
- to isolate/eliminate the most common source, tape a penny opposite the
door pin. when the door closes it should (with penny pressing the door pin)
press the switch deeper, thus ensuring that the circuit is open (ie not
completing a circuit).
when the door pin is marginally about to fail, and with door closed, there is
enough play in the door switch/pin, plus road vibrations...that it believes the
door is open, thus closing the light circuit...activating the logic command to
unlock the door, and even possibly turning on the interior light.
- fortunately, the door switch/pin is roughly $20 part and an easy R&R.
