I think the only MB's in the '95 model year with OBDII were 201's. You can find out at: www.obd2.com Scroll down to the scanners part and click on the "personal" choice. I can't remember exactly where, but there is a list of the early cars with OBDII.
If you pull down the kick panel, the connector should be above the drivers right knee. The information at obd2.com will help you identify it, not only by a list, but also by looking at that connector.