What does the 95 S420 vacuum pump look like?

I'm assuming someone already confirmed that it is bad, and told you to get it, correct? They could have handed it to you in that case. Just google exactly that, there are tons of pictures of them online. I just checked. Go ahead and pull yours out, why not, and compare to what you are buying. You shouldn't need a part number. I hope the problem was diagnosed, and not that since your door locks didn't work someone just told you to buy this pump.

Yes, it was diagnosed...my problem is that my car is in another city and I haven't seen the pump. I did check out ebay, but when I looked up "vacuum pump", it showed 2 different pumps. I understand that there is a pump that is mounted in the trunk and another one mounted under the rear seat inside the car. I need the one that's under the rear seat. The guy told me that it has air lines and electrical wires coming off of it. I just really need to know what the one under the rear seat looks like. Thanx for your help.