Mercedes Glk 350 ABS issue, cannot get the lights off the dash

Asked by Tony Jun 25, 2019 at 04:50 AM about the 2012 Mercedes-Benz GLK 350 4MATIC

Question type: Maintenance & Repair

I replaced all the brakes and new wear pad sensors. This took care of the brake pad wear error on the dash as that's now gone. My code reader told me the right rear speed sensor was gone so I replaced it, cleared the code then took the car out with a clear dash no lights. I got about 50 feet and the lights all came on again, Ran the code reader again which then told me the left rear is an issue. I replaced the left rear speed sensor cleared all the codes and had a nice clean dah with no lights. I drove 50 feet and it xmas again the dash is all lit up. I run the code reader again and it tells me D40C Right rear wheel speed sensor, DB40B Left rear wheel speed sensor. Not sure what to do next to figure out whats on the go with this car. Anyone has any suggestions please let me know currently the car is not drivable as its in limp mode.

Ok fearing I may of had two bad (new) sensors and they were the cheap ones from Rockauto I went to NAPA and bout the expensive ones. Installed them and still same issue. I then took the time to measure the resistance of the new expensive ones and compared that to the new cheap ones and it was exactly the same. I then connected my muitmeter to the plug in for the sensor as in where the sensor harness plugs into the car to see if there was any power there and I get 11 volts on both sides so I am now assuming there is no issue there. I then connected the multimeter to the sensor plug with it installing in the hole for the sensor and then spun the wheel but I get no signal or voltage from either wheel. So now I am wondering my next step...… Please guys anyone has some help here it would be greatly appreciated

2 Answers

3,295

You may have done this, but it may be helpful... https://www.youtube.com/watch?v=zNW3YQhwpK4 Don't have any specific experience with this , but a good BOSCH or independent MB mechanic might have simpler answer...

4 people found this helpful.
10

Hey Tony I'm having wheel speed sensor issues and was wondering if you had an update

1 people found this helpful.

Your Answer:

CarGurus Experts

  • #1
    Paul
    Reputation
    900
  • #2
    Lewis King Sr
    Reputation
    780
  • #2
    Kos MotorCars
    Reputation
    780
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Mercedes-Benz M-Class
14 Great Deals out of 149 listings starting at $3,995
Used Mercedes-Benz GL-Class
71 listings starting at $7,995
Used Mercedes-Benz C-Class
81 Great Deals out of 1,429 listings starting at $3,499
Used Mercedes-Benz E-Class
43 Great Deals out of 500 listings starting at $5,700
Used Mercedes-Benz G-Class
7 Great Deals out of 166 listings starting at $34,800
Used Mercedes-Benz S-Class
15 Great Deals out of 224 listings starting at $8,887
Used BMW X3
44 Great Deals out of 1,035 listings starting at $1,999
Used BMW X5
50 Great Deals out of 1,199 listings starting at $3,900
Used Lexus RX
37 Great Deals out of 924 listings starting at $5,495

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. Content will be removed if CarGurus becomes aware that it violates our policies.