2002 Mercedes Benz CL500 check engine light

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2002 MERCEDES BENZ CL500
V8
2WD
AUTOMATIC
44,000 MILES

2002 Mercedes Benz CL500 Mileage 44,000 I have a check engine light that keeps coming on and going out. Every time I am about to take it in for service the light goes out and the car continues to run fine. If my car runs fine and the light is out why would I take it in when I know they are going to charge me regardless.

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Your car has many systems on board, that require monitoring. All sensors need to be operating. Having your own code reader is a nice tool to diagnose this kind of problem. The code readers that are available today are hand held and plug right into the OBD2 computer link inside your car. You scan your car yourself and retrieve the error codes. The scanners usually come with a chart that lists the codes and their respective components.