Check Engine Light

snowseal19
140

Asked by snowseal19 Sep 14, 2008 at 09:11 AM about the 2003 Mercedes-Benz M-Class ML500

Question type: Maintenance & Repair

My Check Engine Light came on last night. How can I find out what the problem might be? What type of problem/repair can I expect?

7 Answers

Daniel Reed
1,645

You should take it to the dealer, or a private garage that specializes in MB. The cause cause be almost anything- from a loose gas cap, a bad o2 sensor, vacuum leak, or anything else that can affect emissions.

1 out of 1 people think this is helpful.
Roch Drolet
85

I suggest that you go to an MB dealer. It can be expensive but they'll find the problem faster than anybody else. A check engine light, most of the time, means that there's something wrong with the anti-pollution system but with big european car such as yours, it can be much more. Sometimes it's only the fuel cap that's not tight enough so, try tightening your fuel cap and if it doesn't work go see your dealer asap.

2 out of 2 people think this is helpful.
snowseal19
140

Daniel, I did check the gas cap an it was barely screwed on. I tightened the cap, how to I get the Check Engine Light too got out? Thank You, Doug

10 out of 10 people think this is helpful.
snowseal19
140

Roch, I wanted to reply to you as well. I did check the gas cap an it was barely screwed on. I tightened the cap, how to I get the Check Engine Light too got out? Thank You, Doug

4 out of 4 people think this is helpful.
Roch Drolet
85

I'm not sure but i think you could be able to do it with a small OBDII reader, there are some models that have the erase codes function. But the safest way is to go see your MB dealer and do a "quick test quick delete" with the factory code reader.

Alex Nicolau
100

The best thing to do with your vehicle is bring it to the dealer. Mercedes-Benz, being German, can be difficult to diagnose and most shops don't have the correct OBDII software to run all the tests that are needed to properly diagnose a vehicle like this. As far as getting the light to go off, you shouldn't have to do anything. When the problem is corrected and the computer sees X amount of drive cycles completed without fault, the light will go off on it's own. The light can be shut off with a factory scanner, but if the problem remains it will come back on. And just keep mind if you have it repaired somewhere, they are going to shut the light off for you because it can take a while for the computer to cycle and see the problem has been corrected. You would also be pretty mad if you paid to have the car fixed and the light was still on.

opaz1560
40

The problem in taking your car to the dealer, is that they can rip youoff big time, they take your car into a garage far away from your view and you are at ther mercy, there are there few good people, but it happened to me, took my ML500 yr. 05, to oil change, they suggested front end alignment at 35000 miles aprox, pay for and checked oil levels 3 days later, oil was dirty, black and burn, complained about it, but they changed the oil this time, the question here is : How can i trust these people? i still have my car with 635000 miles, and afraid to take it to any dealer, i do my own oil change, paid a mechanic to do the brakes, but; what would i do when my car needs a serious repair ? I LOST MY TRUST WITH ANY DEALER, PERIOD !!! unless i can see the work being done...

4 out of 4 people think this is helpful.

Your Answer

Add photo

Related Questions

  • Check Engine Light 1 answer

    My Check Engine Light is ON for some time. The truck is running fine until recently. Now it is vibrating and slowing down once in a while. What is the reason?

    2000 Mercedes-Benz M-Class ML320

    -

    Maintenance & Repair

  • check engine light 1 answer

    My engine in a 2003 ML320 failed to star up and after about 6 or so tries it did and now the check engine light stays on for a few days then goes out. a few more days of driving and the same problem p...

    2002 Mercedes-Benz M-Class

    -

    Maintenance & Repair

  • check engine light 1 answer

    it keeps on going on the after a few hours it will turn off by it self and i took it a MB dealer and they just keep on turning it of and not saying whats the problem. if the trany is going bad will th...

    2006 Mercedes-Benz M-Class ML500

    -

    Maintenance & Repair

  • Check engine light is on 5 answers

    Light came on at about 147k car seems to be running the same. Any idea what it might be?

    1999 Mercedes-Benz M-Class ML320

    -

    Maintenance & Repair

  • Check engine on E320 1 answer

    Check engine light on

    2001 Mercedes-Benz E-Class E320

    -

    Maintenance & Repair

M-Class
Looking for a Used M-Class in your area?
CarGurus has 9,598 nationwide M-Class listings starting at $1,995.
ZIP:

Search Mercedes-Benz M-Class Questions

Mercedes-Benz M-Class Experts

#1 jihadghazali
jihadghazali
Reputation 310
#2 wellness
wellness
Reputation 280
#3 carGrrl
carGrrl
Reputation 220
View All

Related Models For Sale

Used BMW X5"
354 Great Deals out of 10,607 listings starting at $3,950
Used Mercedes-Benz E-Class"
582 Great Deals out of 18,198 listings starting at $1,700
Used Mercedes-Benz S-Class"
219 Great Deals out of 7,616 listings starting at $2,599
Used Mercedes-Benz C-Class"
675 Great Deals out of 21,749 listings starting at $1,500
Used Porsche Cayenne"
89 Great Deals out of 2,571 listings starting at $8,200
Used Mercedes-Benz G-Class"
21 Great Deals out of 508 listings starting at $22,900
Used Acura MDX"
300 Great Deals out of 11,911 listings starting at $3,950
Used BMW 5 Series"
527 Great Deals out of 16,881 listings starting at $1,500
Used Jeep Grand Cherokee"
1,210 Great Deals out of 56,701 listings starting at $795

Used Cars For Sale

2015 Mercedes-Benz M-Class For Sale
4,283 listings starting at $48,991
2014 Mercedes-Benz M-Class For Sale
12 Great Deals out of 568 listings starting at $43,988
2013 Mercedes-Benz M-Class For Sale
22 Great Deals out of 296 listings starting at $31,995
2012 Mercedes-Benz M-Class For Sale
64 Great Deals out of 1,121 listings starting at $29,995
2011 Mercedes-Benz M-Class For Sale
26 Great Deals out of 737 listings starting at $21,888