Car is a VW Golf GTI Mk5 (2006).
The folding and heating function on passenger mirror isn't working. Everything else works, including electronic mirror adjustment and puddle light. Heating/folding works for driver side.
I've taken the wing mirror off and can't find any open circuits on the wiring loom. It doesn't look like these things are individually fused and replacing the mirror glass didn't resolve heat issue.
Where should I be looking next?
Very appreciative of any help.