Check Engine light came on, right after starting. Got the following codes:

DM Code 4 (Air Injection inoperative)
Code 19 (Fuel Injectors open/short or Emission system at adaptation limit)

Pin 8 Code 13 (O2 at rich limit, mixture too lean)
Pin 14 Code 1 (No faults)

WJM replaced the chip. I would like to replace the chip as well to increase the adaptation range, along with Air/Fuel supply investigation. Below is what WJM wrote about the LH chip mod:


"I have a copy of the Service Bulletin that I received from Steve some time ago. Post your fax # and I can send it to you.

As closure to this particular issue. It turns out the the difference between the computer Mercedes recommends upgrading to and the original is the software on the chip... and at that only 18 bytes of it.

I've run into a few additional people who have had this problem. We went ahead and simply replaced the chip with the newer version (got a copy from someone who had the new computer) and it has so far solved the issue and eliminated the check engine light #19 code.

Willy"

Willy, what is the procedure for upgrading the chip?

__________________
Zafar
94 E320 58000 Miles