2003 ML320 -BRAKE light on, and stuck in 1st gear
Thread Starter
Newbie
Joined: Jul 2019
Posts: 5
Likes: 0
2001 Mercedes ML320
2003 ML320 -BRAKE light on, and stuck in 1st gear
I recently bought a 2003 ML320 an the dash showed the check engine light and ABS related lights. I scanned it for codes and i had codes for the left rear wheel speed sensor, the 02 sensor, and the EGR. I replaced all of those as well as doing a full tune up and air filter, but now when I drive, as soon as I'm about to go Into 2nd gear (around 10mph), the BRAKE light appears and the car starts beeping, and will not allow it to shift into 2nd. As soon as I come to a stop, the beeping stops. The code it reads now is P0500 for vehicle speed sensor A. This car does not have the typical brake light switch under the Dash panel below the Sterling wheel, because the end of 2003 production removed it from there. Due to this, it is hard to find good advice on the internet because everyone just suggests replacing the brake light switch. We have already tested the electrical on several parts that we think could be related, but have recently discovered that the parking brake doesn't stop the car when it's engaged. Any help would be appreciated!
Last edited by Stephanie90; Jul 15, 2019 at 08:41 PM. Reason: Forgot to add obe code
MBWorld Fanatic!
Joined: Nov 2015
Posts: 1,456
Likes: 140
From: Westcoast/Interior
02w163ML500 / 97w210E50AMG / 99w202C230k / 95w124500e-wip
I recently bought a 2003 ML320 an the dash showed the check engine light and ABS related lights. I scanned it for codes and i had codes for the left rear wheel speed sensor, the 02 sensor, and the EGR. I replaced all of those as well as doing a full tune up and air filter, but now when I drive, as soon as I'm about to go Into 2nd gear (around 10mph), the BRAKE light appears and the car starts beeping, and will not allow it to shift into 2nd. As soon as I come to a stop, the beeping stops. The code it reads now is P0500 for vehicle speed sensor A. This car does not have the typical brake light switch under the Dash panel below the Sterling wheel, because the end of 2003 production removed it from there. Due to this, it is hard to find good advice on the internet because everyone just suggests replacing the brake light switch. We have already tested the electrical on several parts that we think could be related, but have recently discovered that the parking brake doesn't stop the car when it's engaged. Any help would be appreciated!
Read here - post #3
Your best friend....try using the search button, top right corner.
Super Member
Joined: Apr 2003
Posts: 690
Likes: 33
From: Bay area - California
2000 ML320 2006 SLK 350
Do you have a W163 specific code reader?
I think, you will have to read the ABS/Traction Control Module extended codes out to understand what might be going on...there could be additional codes stored in there.
The P0500 is a more generic code that says, vehicle is having trouble understanding vehicle speed.
The codes from the BAS/ESP/Traction Control module will read Cxxxx.
https://www.walmart.com/ip/iCarsoft-...0aAhZ9EALw_wcB
For instance, this code reader is able to read the BAS/ESP/Traction Control module...and reveal C codes...you need something like this...
The P0500 is a more generic code that says, vehicle is having trouble understanding vehicle speed.
The codes from the BAS/ESP/Traction Control module will read Cxxxx.
https://www.walmart.com/ip/iCarsoft-...0aAhZ9EALw_wcB
For instance, this code reader is able to read the BAS/ESP/Traction Control module...and reveal C codes...you need something like this...
Last edited by mihir_d; Jul 15, 2019 at 11:25 PM.
MBWorld Fanatic!
Joined: Oct 2011
Posts: 7,107
Likes: 765
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
Trending Topics
Thread Starter
Newbie
Joined: Jul 2019
Posts: 5
Likes: 0
2001 Mercedes ML320
Related??
Would any of these codes cause the BRAKE light to illuminate and beep at 10mph, and get stuck in 1st gear?? Seems so unrelated, but so do a lot of things in this car!! Ive heard from so many people that their car isnt pulling a code for the problem im having, so i dont want to get my hopes up that fixing these things will solve it.
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Thread Starter
Newbie
Joined: Jul 2019
Posts: 5
Likes: 0
2001 Mercedes ML320
FIXED!!
Fixed, Yay! I put it on a different scanner and got codes for both left AND right speed sensor this time, so I swapped out the right sensor with the old sensor (since everything worked fine with that one before I swapped it out, i just did it because I was replacing the left one), and it worked! Also, on the scanner before I changed the sensor back to the original one, it said I was going to 0 miles an hour when i was driving, so apparently the rear right speed sensor must control something very important to make it not want to shift!! Im thinking it was a faulty sensor from the factory, weirdly enough. Thank you all so much for your input and advice because I never would have thought to try a more equipped scanner for Mercedes!
Last edited by Stephanie90; Jul 17, 2019 at 11:17 AM.
Super Member
Joined: Apr 2003
Posts: 690
Likes: 33
From: Bay area - California
2000 ML320 2006 SLK 350
You seem to have a seat belt issue going on as well...
Yes, for these older cars, if you plan to keep the car, invest in a Mercedes specific code scanner. They are well worth the investment.
The extended systems on these cars like SRS, ESP, MCS etc. are not part of standard OBD II.
Any control unit unit that pertains to the body of the vehicle, I believe throws Bxxxx codes. That’s the seat belt code that you are getting.
Cxxxx are chassis codes.
Pxxxx are engine codes.
The extended systems on these cars like SRS, ESP, MCS etc. are not part of standard OBD II.
Any control unit unit that pertains to the body of the vehicle, I believe throws Bxxxx codes. That’s the seat belt code that you are getting.
Cxxxx are chassis codes.
Pxxxx are engine codes.
