Altitude Correction Module
Quick Question: The altitude correction module (correct name?) on my 88 560SL has a nipple on it that "looks" like something should be attached (vacuum hose?). It DOES have the electric wires attached, but the nipple part puzzles me.
Is there something else that should be attached? This thing is simply "hanging" under the plastic cover that's under the floor mat.
Thanks for your help...