check engine light stays on all the time

Asked by Feb 18, 2014 at 01:14 PM about the Mercedes-Benz 300-Class

Question type: Maintenance & Repair

the check engine light stay on all the time. I have tighten the gas cap many times but light stays on

1 Answer

125

It is unfortunate that you are experiencing such an annoying event. The check engine light could be caused by any number of things, for something as simple as bad fuel or worn spark plugs and cables (if yours is gasoline) to head gasket. HAVE IT CHECKED! An authorized service professional who can plug into the car, read the codes and share what is wrong. If you have had the scheduled service as required by Mercedes Benz, it could be very minor and very inexpensive, if ignored, the changes of it becoming a major issue is guaranteed, equaling higher repair cost and higher fuel consumption. I have learned the hard way, those lights come on for a reason. Have your car checked. As yourself, when is it a convenient time to be stranded.

Your Answer:

Mercedes-Benz 300-Class Experts

  • #1
    James Ramond
    Reputation
    250
  • #2
    Tom Demyan
    Reputation
    230
  • #3
    COMETGUY61
    Reputation
    210
View All

Related Models For Sale

Used Mercedes-Benz C-Class
688 Great Deals out of 26,457 listings starting at $1,750
Used Mercedes-Benz E-Class
441 Great Deals out of 19,943 listings starting at $1,995
Used Mercedes-Benz CLA-Class
174 Great Deals out of 6,658 listings starting at $14,495
Used Mercedes-Benz S-Class
142 Great Deals out of 7,007 listings starting at $3,495
Used BMW 3 Series
867 Great Deals out of 31,428 listings starting at $1,250
Used Mercedes-Benz CL-Class
22 Great Deals out of 495 listings starting at $4,498
Used Mercedes-Benz SL-Class
47 Great Deals out of 3,049 listings starting at $2,999
Used Mercedes-Benz AMG GT
745 listings starting at $86,990
Used Mercedes-Benz CLS-Class
70 Great Deals out of 2,153 listings starting at $6,000
Used Mercedes-Benz CLK-Class
26 Great Deals out of 977 listings starting at $2,495
Used BMW 5 Series
423 Great Deals out of 16,658 listings starting at $2,000
Used Mercedes-Benz B-Class
4 Great Deals out of 94 listings starting at $16,798
Used Mercedes-Benz G-Class
6 Great Deals out of 1,729 listings starting at $19,700

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.