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2006 third brake license light flickers with key out

3K views 4 replies 3 participants last post by  43sqd 
#1 ·
we have a 2006 ml 350 with a battery drain. the license plate light and the third brake light do not stay on constantly or at full strength, mostly dim flicker and off for some time any advise would be appreciated.
 
#5 ·
I agree with Triton. You probably have a water leak which has affected the Rear SAM Unit.

Pull up the large trap door in the cargo area and remove the spare tire and everything else to expose the metal floor. If you do find water, your leak is caused by faulty rear tail light foam seals, part #164 826 15 91 for left rear and #164 826 16 91 for right rear.

Pull out the rubber drain plugs on the chassis floor to drain the water.

If you have an automatic tailgate opening system, also check for water entry at the module and the hydraulic pump.
 

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