It is possible to find a newer/used wire harneses on ebay taken from a car that already went through the replacment but is now being parted out. Ask for the "Fertigungsdatum" (aka the "production" date) FYI - There may be two dates on the harness part number tag. You want the newest production date you can find. I found one for $400 that was manufactured in 2000 (I have an '94 E320).

Your next thing to consider is whether the car needs the throttle repaired or replaced (they were made with the same biodegradeable wiring as the wire harness). This can go from a DIY rewire project, to a $300 rebuild at BBA Reman, all the way up to paying to have Beckmann's reman the potentiometer, which for me was more than the cost of a new throttle. Again, you may find one on Ebay that is out of a '95 or already rebuilt, etc.

Jim