Just figured I'd post a bit on info on the upper wiring harness on a 92 400E. I replaced the harness roughly in 2004 - the tag on it looks to show a 2003 build date (bought the new one from a mercedes dealer in CA). Anyway as the car is now a parts car I figured I should take the harness out. Well the new one does not seem to show any signs of cracking on the exposed wires. However, the double insulation over the fuel inj connectors and front engine connectors is quite hard (more so than the old crumbly one which I still actually have around). While I don't believe this will cause any failures it is interesting that they upgraded the wire but may have gotten a less than optimal solution on the extra insulation.

Paul