Yay my first post. Honestly, there is a lot of truth above. The smg is the biggest issue I see with them. It's never a small repair either. The diagnostic on them SUCKS, even the factory is limited in properly diagnosing them. The internal engine oil feed to the vanos can be an issue on them too. As far as mechanical failures mostly just alternators causing voltage issues. Also the occasions bad cat, and bad throttle motor.
I couldn't/wouldn't try to afford one.