S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

Interior lights won’t go off

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Old Aug 1, 2020 | 04:37 PM
  #1  
Frank02261979's Avatar
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Joined: May 2014
Posts: 35
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From: Houston, TX
2011 E550 Coupe, 2008 S550, 1997 S320, 1997 E320, 1985 300SDL, 1968 250S, 2003 Jaguar XJ8 VDP
Interior lights won’t go off

My interior lights are draining the battery. Dome lights are doing the following:

1) coming on as if they were turned on the last time I was in the car, not the courtesy light function. They have to be turned off, both front and rear.
2) neither front map light will come on (will occasionally intermittently but completely random)
3) courtesy function seems fine after main light manually turned off.

the doors don’t seem to affect the function nor the trunk.

any suggestions or ideas? Would sure appreciate insight. I suspect the dome light assembly needs to be replaced but other opinion would be appreciated.
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Old Aug 2, 2020 | 12:39 AM
  #2  
konigstiger's Avatar
Out Of Control!!
 
Joined: Jul 2003
Posts: 15,901
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From: North Scottsdale, AZ
'71 Pinto
Rear SAM pull f126 (25A) for 30 minutes in an attempt to reset OCP. If this fails best to check for fault codes using MB diagnostics before replacing parts.



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Old Aug 2, 2020 | 12:51 AM
  #3  
Frank02261979's Avatar
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Joined: May 2014
Posts: 35
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From: Houston, TX
2011 E550 Coupe, 2008 S550, 1997 S320, 1997 E320, 1985 300SDL, 1968 250S, 2003 Jaguar XJ8 VDP
Thank you so much, I’ll try that first thing. Appreciate it
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