HI I OWN A 95 C280 MERCEDES BENZ.IM HAVING ISSUSES WHILE DRIVING AND CHECK ENGINE LIGHT IS ON .I HEAR WHAT I THINK IS THE INTAKE BACK FIRING WHEN DRIVING UP HILL AND WHEN ACCELERATED FAST "SOUNDS LIKE ENGINE COUGHING". THEN AFTER THIS HAPPENS ENGINE STARTS TO SHAKE. I THEN HAVE TO PARK TURNOFF CAR THENRESTART THE CAR TO STOP SHAKING? LADY THAT I GOT IT FROM SAID THE CHECK ENGINE LIGHT HAS BEEN ON FOR A YEAR AND HAS BEEN DRIVING SINCEAND SHE SAID SHE REPLACE THE 02 SENSOR BY MECHANIC. HAD THIS CAR FOR ABOUT 10 MONTHS. NOTICEING THINGS LIKE GAUGES TAKE A WHILE TO WORK ENGINE WIRE HARNESS IS VERY TIGHT AND BRITTLE IN SOME PLACES CARS TEMP IS HIGH IN TRAFFIC . BUT STILL A VERY SMOOTH AND FUN CAR.BUT I ALSO HAVE NO IDEA HOW TO HOOK UP THE FACTORY AMP .

can SUMONE HELP POINT ME IN THE RIGHT DIRECTION I THINK ALL IT NEEDS IS A TUNE UP NEW SPARK PLUGS AND A MASS AIR FLOW SENSOR? IF ANYONE OUT THER CAN SHARE SUM KNOLEDGE PLEASE LET ME KNO THANKS