Famous Mercedes Benz Ml350 Check Engine Light Ideas. Web mercedes check engine light diy. If the fuel cap is not tight or not sealing properly, the check engine light will come on.
If it fails this test, then you will get cel. If the fuel cap is not tight or not sealing properly, the check engine light will come on. I just bought the car and knew it had the esp/bas light on, but soon after running a diagnostic at autozone, the check engine light came on as well.
