Cold start valve nut: 12mm
6 fuel injector nuts: 14mm
Main fuel line: 19mm or 17mm
Fuel return line: 19mm or 17mm
3 nuts holding fuel distributor: 10mm
Only need to disconnect one hose on right of IACV.

I suggest replacing IACV hoses while you are there, also might need the nylon fitting going to the air meter boot and replace gasket on throttle body. You can also use black silicone rtv. 4 pea-sized drops on each side and use a gloved finger to spread it and cover the area in a thin coat. 5mm hex to remove 4 bolts on throttle body and 5mm hex to remove 2 bolts on cold start valve. Also consider replacing boot on bottom of fuel distributor. It's about 11 various nuts and bolts all 10mm that need to be removed.

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1990 190E 3.0L