Someone on another forum asked me to provide details about the diagnostic ports and the building of a code reader for my '88 560SL. Thought it might be a good idea to have it here too.
Len
Keep in mind I'm talking about my '88 560SL here. Not sure all years have things in the same location. I found the nine pin diagnostic port on the driver's side fender well. It has a screw on cap. See first photo. This diagnostic port reads engine duty cycles only. You can buy a multimeter that has the duty cycle function or if you have a dwell meter, you can use that since it also reads duty cycles.
The second diagnostic port was right in front of me, but much as I looked, I couldn't find the darn thing. See second photo. It is about three inches forward of the first diagnostic port on the driver's side fender also. It is covered with a plastic cap that deceived me into thinking it was something else. Many have said that they found this second diagnostic port on the passenger side on the firewall on other Mercedes of that same era. This second diagnostic port is the one you need the blink code reader for.
The following links will describe the parts needed to build your own code reader and instructions on how to do it. I bought all of my supplies at Radio Shack for under twenty bucks and built it in an hour or so.
http://www.geocities.com/MotorCity/D.../cs1000_mb.pdf. These are the instructions from Mercedes for using the code reader. Only pages 9, 10 and 113 applied to me.
K6JRF Auto Page. This is a good page on code reader's in general and also gives the procedure and parts needed to build your own.
http://mywebpages.comcast.net/chwilk...reset_tool.htm. This one takes you through the SRS problem on an '89 560SEC and has some good pictures and instructions.
That ought to do it.
Linear Mode
