Electrical Issues Due to Degraded Engine Wiring Harness on Mercedes-Benz C220

Problem Description and Possible Solution

The engine wiring can degrade because the insulating material falls off leaving the bare wire exposed. This can cause many problems depending on which wires are exposed and what they touch.

Problem Data
RepairPal Verified
Average mileage: 151,057 (72,000–276,000)
3 model years affected: 1994, 1995, 1996
18 people reported this problem
Viewing 1 - 11 of 11 comments
engine wiring harness failure. Had car since new, 100% services and wanted to keep but it is worth $2500 whoesale but cost is excessive to replace wiring harness. what is cheapest fix?
Rough idle, engine misfires above 3000 rpm. Inspected wire harness and noted degraded wire insulation causing intermittent shorts throughout the entire harness. Dealer wanted $800 for the harness and 5 hours labor at $130 per hour, I purchased the Mercedes OEM harness through ECS Tuning ( for $608 and installed it in 6 hours. Fired right up and runs smooth as new.
I'm driving my Mercedes Benz C220, 1996 and suddenly the engine stops.

When I try to start the engine again, the alarm lights are activated in the rearview mirror and the engine will not start.

Since I put duct tape on the broken wires arness engine, and continuous failure.

Anyone know if the proble is alarm or cable insulation,
$965.25 parts, $780 labor = $1745.25
Blue book private party value for car is only about $2500
Will look for a less expensive fix--perhaps $608 for part plus 6 hours self labor, as noted below.
I noticed my c220 1995 model had difficulty in running. later we observed it was on plug 2 and 3 that were firing so i replaced the coil. Shortly after that the same problem started again so i changed the air flow meter to no avail. But i later found out that my amnestic cable was bad because the insulators were flaking off so i changed the entire cable. Unfortunately for me the car entirely stopped running only to be told my brain box has gone bad. Now i have tried getting a new brain box of same cord number but the car would not run. A different cord was discovered to run with it but running is not smooth and temperature rises above normal. This is giving me serious heart ache and i know not what to do next.
i almost died on the freeway when the car stopped in the fastlane and a car hit me due to the wiring harness being faulty. MB needs to acknowledge this and make it a recall the cheapest i seen the parts for is $450 on ebay