There is something wrong with german engineering on the tail light design. on the new ML it happens exactly the same way it did on my X5. 3 weeks ago, i have to fix both tail lights on the ML and the X5 at the same time. First for ML 2nd time for X5 (different contact point). Easy fix, $7 soldering gun and lead from Radio Shack. Good luck.

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2002 X5 3.0 Siena Red
Premium, Cold Weather, Rear Climate Packages, 19" Wheels
Aluminum Running Boards, Clear Tail Lights, Clear Side Markers
Titanium Kidney Grills, Titanium Trunk Lid, Xenon Headlights
4.6is X5 exhausts, 35% Tint, Aluminum Pedals
2005 530I Mystic Blue
Premium Package, Sport Package, Xenon Headlights
18" Sport Wheels, 35% Tint all around
Mods to come: M-Tech Front Bumper, M5 Side Skirts, M5 Rear Bumper
Quad Exhausts, Style 172 19" Wheels