ETKA shows three part numbers for the starboard mirror; two of them say "convex" and one says "aspherical":
357 857 522 A,
357 857 522 B,
357 857 522 C.
1. What's the difference between them? None of them show up in the catalogs of US distributors, but I can get all three from European eBay sellers, mostly used.
2. My wiring diagrams show that the heating elements are powered by the defogger switch, but research shows forum posts that claim the neutral position on the mirror adjustment switch is what turns them on, the ease of which is responsible for a high failure rate. Which is it?
357 857 522 A,
357 857 522 B,
357 857 522 C.
1. What's the difference between them? None of them show up in the catalogs of US distributors, but I can get all three from European eBay sellers, mostly used.
2. My wiring diagrams show that the heating elements are powered by the defogger switch, but research shows forum posts that claim the neutral position on the mirror adjustment switch is what turns them on, the ease of which is responsible for a high failure rate. Which is it?