Symptoms will be associated with a vacuum leak. There are two vacuum nipples sticking out, one straight and one angled. The angled one connects to a tube running from the throttle body, the straight one runs to a vacuum connection on the left fenderwell, the purge valve. Depending on which one is broke, you may have a vacuum leak constantly, or, only when the switch opens at 50 degrees C.

If you have the CD rom set, you can find the diagram under fuel system, 47-200, Funtion of fuel evaporation system.

Fastlane didnt have the part# 001-140-62-60. My local dealership did for $12.65.

My car is a 89 300SE so the parts should be the same.

Good luck
Jeff