Juan,

Your car can be modified. This thread is pretty old, it reflects the discovery process forum member Jim Forgione went through in coming up with this idea. Mr. Fiorgine later determinedd that our cars (95 E320) can also be modified. He sells a "cool harness" for your car. Here's the link:

http://pages.prodigy.net/jforgione/MB_S500.html

Scroll down toward the bottom and read the information about the cool harness version 2.