So, I looked and I have the 16-pin deal on the firewall of my 1992 SL500 on the passenger side. Is there a code reader tool available that anyone knows of? I have seen the posts with homemade options and the newer, more pin OBDII readers, but I understand in the 1992 I need something different. Any suggestions would be appreciated on where to look/buy. I checked ebay and everything is an adapter.