I have the stock idle air solenoid:
But system has an auxilliary air control also, this one:
I'm not sure whether this is part of current motronic config or it comes from some jetronic system. Harness is connected however.
Edit: Pictured 'auxiliary air control' valve is EVAP purge canister valve. You could left it out and block it connection from throttle body.
- Thanks BengtR, I'll eliminate that ballast soon :)