Just got an AirCat brand 3/4" drive impact and I've been going at the 16v with it like a madman. For those bolts that haven't been touched for 35 years. I've used Bluepoint and craftsman impacts, and they have nothing on this thing. Especially for the axle nuts and that front bolt on the engine on the balancer that's torqued to like 200+ lb/ft.... that and my spring compressor tool are some of the biggest time savers I've bought.
1985 190e 2.0 8v forged internals, 5spd MT, EFI, 16v interior, sportline exterior, working on the turbo header now
1986 190e 2.3-16 Nam, 5spd MT, stripped to the bone, I swear I'll start building it into a track car soon, seriously.