Been there, done that. Bought mine from 4Mercedes and they did additional testing on other modules for me. Very good people. Easy DIY on my 94 e320 Wagon.

Call me tonight or tomorrow 610-776-7575 I also have piks.

Quick notes from foggy memory until I dig exacting instructions
1] Disconnect air intake & rubber extender
2] Disconnect elec harness connector
3] Disconnect vac lines 2 / 3 ?
4] Disconnect turnbuckle [back of TB toward firewall] ball connection & spring
5] Remove flap housing 2 visible bolts and 2 under plastic caps
6] Remove 4 bolts securing TB
7] Wiggle twist & shout TB through 3 & 4 intake runners.