I'm in the process of replacing my '95 E300D engine wiring harness with a new one. I'll post info on where I purchased the harness and other details in a separate post once I get the new harness in and confirm its correct fitment and operation. This is a newly manufactured harness, not NOS. I'll take some pictures of the old and new harnesses and post them, along with my comments along with contact information for the supplier.

Looking at the old harness now that it is largely free, I can see that while my wiring isn't as bad as some pictures I've seen with cracked and shedding wire coverings, mine was definitely beginning to go with some longitudinal cracks visible in some of the wires plugged into electrical components. Looking at some of the none-engine harness wiring, it does not appear to be in the same condition and what I can see of it still appears to be completely intact.

In removing the old harness, however, I've run up against the firewall, literally. The last bundle of wires to be removed disappears through a hole in the insulation at the center of the engine compartment and seems to run into the area behind the battery. How does one get through the firewall without shredding the insulation? It appears there is some kind of clip behind the insulation just above the hole for the harness, but I see no way of accessing it. If anyone has run this route before, I'd appreciate any guidance that could be offered for completing the removal of the old harness and installation of new. Thanks!


Regards,
Tom