MANY OF THE COMPLAINTS I HAVE READ ARE ABOUT EARLY 1990 W124, W126,W140,W201 AND W202 MODELS. MY COMPLAINT WAS REGARDING AN ELECTRICAL MELTDOWN THAT OCCURRED ON THE 1989 560 SEL W126 LAST FRIDAY. I RECENTLY BOUGHT A SECOND CAR AND NOTICED THAT THE ENGINE HAD A LUMP OR A SURGE AT IDLE AND AT OPERATING SPEED. I THOUGHT SINCE THE CAR SAT FOR A WHILE BEFORE I BOUGHT IT THE PROBLEM WAS FUEL RELATED. I TOOK THE CAR TO REPAIR SHOP FOR A NEW FUEL FILTER. TWO DAYS AFTER I BOUGHT IT THE CAR WAS RETURNED AND IT WAS RUNNING FINE UNTIL I STARTED GETTING THE LUMPY IDLE AND SURGE AT SPEED. MY MECHANIC TOLD ME THAT THE CAR NEEDED TO BE DRIVEN. I DID JUST THAT, AND TOOK THE CAR ON THE HIGHWAY WHICH DID NOT CURE THE PROBLEM. I NOTICED THAT WHILE I WAS DRIVING THE CAR SEEMED TO BLACK OUT TEMPORARILY, CUTTING IGNITION AND FUEL, BUT I THOUGHT IT WAS A FLUKE AND CONTINUED DRIVING. WHEN MAKING A TURN LATER INTO THE GAS STATION THE CAR BLACKED OUT COMPLETELY AND SMOKE EMERGED FROM THE RIGHT FRONT OF THE CAR. I OPENED THE HOOD AND THE WIRING WAS ON FIRE. I IMMEDIATELY PUT OUT THE BLAZE AND HAD THE CAR TAKEN BACK TO THE REPAIR SHOP. AS OF NOW MY MECHANIC WAS GETTING A WIRING DIAGRAM OF THE CAR, AND WILL BE INVESTIGATING WHAT HAPPENED SO I COULD REPORT THIS TO MY INSURANCE COMPANY. I AM NOT SURE WHAT THE CAUSE E WAS, BUT WE WERE LEANING TOWARD A FAULTY WIRING HARNESS. ALTHOUGH IT HAD OVER 150,000 MILES, I HAVE NEVER SEEN ANYTHING LIKE THIS HAPPEN. ONE WOULD AN ENGINE OR TRANSMISSION PROBLEM,