There is a wired fix for the problem. I don't recall the specifics I think a bulb holder from a Mercedes is hard wired to the wiring loom and completely eliminates the contact problem. Each lamp gets directly wired as virtually all cars on earth are done.

Otherwise a proper fix as I've demonstrated in the past is not difficult. Tinning with solder for example is no more a fix than wrapping the bulb contacts with aluminum foil.

Rebuilding the steel contact plate with heat proof shims and self tapping screws is a near permanent fix. (You do need to also keep three contact clean by remove and replace the bulb socket maybe annually to scrape off the corrosion that leads to the overhearing that melts the plastic)

That said, I replaced my headlights with aftermarket halo models and was planning on doing similarly for the rears. I would look into some nice LED tails that will refresh the tail end for a "butt lift" concept

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)