Interior trim I restored a lot of E46 things that were scratched up, or had been replaced with nasty parts, or were just installed incorrectly.
Deflecting A wind deflector is essential equipment in a convertible, so it should come standard in my opinion. I had to buy one, because BMW.
Refinishing a leather steering wheel I had a steering wheel that looked a bit second hand. Fair enough after all those years of pawing. So I refinished it... with some good stuff.
Restoring badges BMW love putting their logo everywhere on cars they build. They're proud of it. One of the first things I did to Arraow was to replace all of the exterior roundels.