Below is a responce I sent to NHTSA today.

Hello Kristin,

The document you sent me is an Adobe document which can not be modified. Therefore I am not able to make changes to your attached document. I have tried to add to the issue below.

What you wrote:
TL*THE CONTACT OWNS A 1992 MERCEDES BENZ 300SE. THE CONTACT NOTICED THAT THE VEHICLE WAS NOT IDLING PROPERLY. THE VEHICLE WOULD STALL WHILE AT A STOP SIGN AND COMPLETELY SHUT OFF. THE VEHICLE WAS ABLE TO BE RESTARTED IMMEDIATELY. THE DEALER STATED THAT THE ENGINE WIRING HARNESS WAS FAULTY. THE MECHANIC SUGGESTED THAT HE NOTIFY THE MANUFACTURER, BUT THEY CLAIMED TO NEVER HAVE HEARD OF THE FAILURE AND COULD NOT ASSIST. THE VEHICLE HAS NOT BEEN REPAIRED. THE CURRENT AND FAILURE MILEAGES WERE APPROXIMATELY 100,500.


My additions (in red):
THE ISSUE AS DESCRIBED ABOVE IS FROM THE RESULTS OF A DRYROTTED ENGINE WIRING HARNESS. DURING THE TIME PERIOD THIS CAR WAS MANUFACTURED MERCEDES BENZ USED A BIODEGRATABLE MATERIAL FOR THE WIRE COVERINGS. THIS MATERIAL THROUGH THE YEARS COULD NOT WITHSTAND THE HEAT PRODUCED BY THE ENGINE UNDER THE HOOD. THIS IS A PROBLEM THAT MERCEDES KNOW ABOUT AND HAS SINCE CHANGED THE WIRING HARNESS COVER MATERIAL A FEW YEAR LATER. ALL THEIR MECHANICS KNOW THIS AND IT IS WELL DOCUMENTED ON EVERY MERCEDES FORUM THAT I HAVE FOUND. I AM TALKING ABOUT THOUSANDS OF ACCURANCES RECORDED. THE REDESIGNED HARNESS IS A $600.00 ITEM WHICH IS WHY MERCEDES TENDS TO LOOK THE OTHER WAY AND REFUSES TO ACCEPT THIS AS A RECALL ITEM. THIS ITEM MUST BE ADDRESSED BECAUSE IF GONE UNATTENDED IT BECOMES A SERIOUS FIRE HAZZARD WHICH IS ALSO WELL DOCUMENTED AND WAS MENTIONED BY MY MECHANIC. HE ALSO STATED THAT MOST MECHANICS WILL NOT WORK ON THESE CARS UNLESS THE ENGINE HARNESS IS REPLASED FIRST. THIS IS BECAUSE THE CAR IS IMPOSSIBLE TO DIAGNOSIS IF THE WIRING IS NOT IN A GOOD WORKING CONDITION DUE TO THE FACT THAT FALSE SIGNALS ARE SENT TO THEIR DIAGNOSIIC EQUIPMENT.

MY MECHANIC ALSO PROVIDED ME WITH ADDITIONAL INFROMATION DIRECTLY FROM HIS MERCEDES BENZ PRELIMINARY INSPECTION & ADJUSTMENT PROCEDURES MANUAL. IT IS RETYPED AND QUOATED EXACTLY AS THE MERCEDES BENZ DOCUMENTATION STATES.

PRELIMINARY INSPECTION & DOCUMENTATION
VISUAL INSPECTION

1) VISUALLY INSPECT ALL ELECTRICAL WIRING, LOOKING FOR CHAFTED, STRETCHED, CUT OR PINCHED WIRING. ENSURE ELECTRICAL CONNECTORS FIT TIGHTLY AND ARE NOT CORRODED. CHECK FOR LOOSE OR DEFECTIVE ELECTRICAL CONNECTIONS ON STARTER MOTOR. ENSURE ALL VACUUM HOSES ARE PROPERLY…

NOW I ASK YOU; IF THIS IS NOT KNOWN BY MERCEDES BENZ TO BE AN ISSUE THEN WHY IS IT THE VERY FIRST THING IN THEIR PRELIMINARY INSPECTION THAT THEY HAVE ALL OF THEIR TRAINED MECHANICS LOOK FOR?

BELOW ARE SOME PICTURES OF THIS DEFECT:


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ABOVE IS AN EXAMPLE OF THE WIRING HARNESS THAT ATTACHES TO THE ENGINE’S CARBARATOR BASE WHERE FUEL CAN COME IN CONTACT VERY EASILY RESULTING IN AN ENGINE FIRE. ALSO NOTICE BARE WIRES THAT MAY CONTACT ONE ANOTHER WHICH COULD LEAD TO A SPARK AND RESULTING INTO AN ENGINE FIRE.



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ABOVE IS ANOTHER EXAPMLE OF A DRYROTTED ENGINE HARNESS WHERE WIRES ARE EXPOSED TO ONE ANOTHER.




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ABOVE IS AN EXAMPLE OF BARE WIRING LEADING TO THE ENGING COIL, THE COIL HAS VERY HIGH VOLTAGE WHICH PRODUCES SPARK FOR EACH CYLINDER IN THE ENGINE. THE GREEN IS THE COPPER WIRE CORRODING.




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ABOVE IS AN EXAMPLE OF A CONNECTOR THAT SHATTERED WHEN REMOVED DUE TO THE FACT THAT IT COULD NOT WITHSTAND THE HEAT UNDER THE HOOD.


I have documented and stated my case very well. If you or your organization NHTSA have questions or require further information please let me know. I believe that this is irresponsible on Mercedes Benz’s part to not address this very serious issue. It is not my intent to bash or disrespect Mercedes Benz in any way. They are known for making a very well engineered and safe automobile and that is exactly what I thought I was getting when I purchased mine. However, this issue has gone overlooked and it is my sincerest hopes to get it addressed through the Department of Transportation.



Best regards, Earl