I'm having the same issue on my touring. I replaced the inner motor, traced back the loom no break at all, so it must be this bastard button. Is it worth replacing the entire glass for it? I could probably source a cheap one.
Hi all long time lurker this forum provided me all the info for an m62 swap I am currently undertaking. Recently purchased a 540i as a donor for all the running gear as the body was shagged. The car runs sweet as a nut and has had no expense spared by previous owner (spent £27K since 1999) who only ever took it to BMW partridge for anything it needed (have receipts for every tyre change). Noticed a Big smell of fuel yesterday in traffic to see a lot of fuel leaking from rear. Looks to be the fuel lines which are royally fucked. I have a mint bodied 520i I am dropping the whole running gear into. The question are the fuel lines the same for the V8 and M50 E34's? The other question is it easy enough to do/worth doing? I will have everything going into the m62 car within the next two weeks. That smell all and spray of fuel was very scary. I'd rather get a new set from BMW, but want to confirm if either for the V8 or the M50 ones I will need. Any advice or comments appreciated!