I noticed you guys were talking about a vac pump under pass seat. Does a 98 sl500 have the same pump located under the pass seat? The reason I ask is I had my car on the lift the other day and noticed what seemed to be oil leaking from a hole right under pass seat area. I'm thinking to myself what could leak oil from that area of the car. Is there oil in the pump or is there anything else in that area that has oil in it? or am I just going crazy. Oh by the way I've been a GM tech for 16 year and I'm very familiar with GM cars but when it come to MB I'm a little lost for now but I'm trying to learn.