M-Class (W164) Produced 2006-2011: ML280CDI, ML320CDI, ML420CDI, ML350, ML500, ML550

Replaced right front seat belt; Now red "SRS" is illuminated on dash

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Nov 9, 2019 | 08:33 PM
  #1  
5hundo's Avatar
Thread Starter
Member
10 Year Member
Liked
 
Joined: Jun 2013
Posts: 94
Likes: 5
From: Pike Road, AL
2008 ML320 CDI
Replaced right front seat belt; Now red "SRS" is illuminated on dash

Hey guys. The driver's side seatbelt on my ML320CDI came apart, so I ordered another one from ebay. After I replaced it, the "SRS" dash light is illuminated on the dash.

The part I ordered was used, so I'm thinking it was a bad part unless there is something in the dash that needs to be reset. I wouldn't have thought that this part would be something that needed resetting but this car has surprised me in the past.

Any ideas, or is it just a bad part?

Thanks for your help!!
Reply
Old Nov 10, 2019 | 04:16 AM
  #2  
virgisr's Avatar
Member
 
Joined: Sep 2017
Posts: 173
Likes: 25
From: UK
Mercedes R320L CDI 4MATIC 2007
Originally Posted by 5hundo
Hey guys. The driver's side seatbelt on my ML320CDI came apart, so I ordered another one from ebay. After I replaced it, the "SRS" dash light is illuminated on the dash.

The part I ordered was used, so I'm thinking it was a bad part unless there is something in the dash that needs to be reset. I wouldn't have thought that this part would be something that needed resetting but this car has surprised me in the past.

Any ideas, or is it just a bad part?

Thanks for your help!!

On the manual it says after replacing the seat belt the fault code reading and clearing has to be performed. It will be cause there is a connector on the reel of the seat belt, when you disconnect it, the fault is registered.
You will need a scanner to clear the fault. Or you can try disconnecting the main battery, wait for some 10-15 minutes, reconnect it.
Reply
Old Nov 10, 2019 | 06:52 AM
  #3  
5hundo's Avatar
Thread Starter
Member
10 Year Member
Liked
 
Joined: Jun 2013
Posts: 94
Likes: 5
From: Pike Road, AL
2008 ML320 CDI
Originally Posted by virgisr
On the manual it says after replacing the seat belt the fault code reading and clearing has to be performed. It will be cause there is a connector on the reel of the seat belt, when you disconnect it, the fault is registered.
You will need a scanner to clear the fault. Or you can try disconnecting the main battery, wait for some 10-15 minutes, reconnect it.
Okay, great! I'll try to clear it with my scanner. Hopefully it works.

Thank you!!!
Reply
Old Nov 10, 2019 | 08:54 AM
  #4  
Maj. Dundee's Avatar
MBWorld Fanatic!
 
Joined: Oct 2011
Posts: 7,107
Likes: 765
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
If your scanner is unable to access the Emergency Tensioning Retractor module to read the codes and then delete them, the SRS light will continue.

Read #11 in the R&I PDF.
Attached Files
File Type: pdf
R&I Front Seat Belt.pdf (131.0 KB, 453 views)
Reply
Old Nov 11, 2019 | 12:19 AM
  #5  
5hundo's Avatar
Thread Starter
Member
10 Year Member
Liked
 
Joined: Jun 2013
Posts: 94
Likes: 5
From: Pike Road, AL
2008 ML320 CDI
Originally Posted by Maj. Dundee
If your scanner is unable to access the Emergency Tensioning Retractor module to read the codes and then delete them, the SRS light will continue.

Read #11 in the R&I PDF.
Yeah, my OBD scanner can’t see the faults. It’s showing no codes at all. So will I have to take it to a dealer now?

Will disconnecting the battery even be worth a shot?
Reply
Old Nov 11, 2019 | 04:06 AM
  #6  
Maj. Dundee's Avatar
MBWorld Fanatic!
 
Joined: Oct 2011
Posts: 7,107
Likes: 765
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
Originally Posted by 5hundo
Yeah, my OBD scanner can’t see the faults. It’s showing no codes at all. So will I have to take it to a dealer now?

Will disconnecting the battery even be worth a shot?

Disconnecting the battery will not delete the problem.

A visit to a dealer will cost you more than owning your own scanner.

Amazon Amazon
Reply
Old Nov 11, 2019 | 11:22 AM
  #7  
5hundo's Avatar
Thread Starter
Member
10 Year Member
Liked
 
Joined: Jun 2013
Posts: 94
Likes: 5
From: Pike Road, AL
2008 ML320 CDI
Originally Posted by Maj. Dundee
Disconnecting the battery will not delete the problem.

A visit to a dealer will cost you more than owning your own scanner.

https://www.amazon.com/Autel-MD802-D...ateway&sr=8-3/
Thanks Dundee! The scanner I have is very low-end, so I'm not surprised it didn't work.

The one you suggested will? It looks more complicated, so I might have to ask again once I get it.
Reply
Old Nov 11, 2019 | 01:38 PM
  #8  
Maj. Dundee's Avatar
MBWorld Fanatic!
 
Joined: Oct 2011
Posts: 7,107
Likes: 765
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
Originally Posted by 5hundo
Thanks Dundee! The scanner I have is very low-end, so I'm not surprised it didn't work.

The one you suggested will? It looks more complicated, so I might have to ask again once I get it.
It comes with a user manual,
Reply
MB World Stories

The Best of Mercedes & AMG

story-0

6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

 Verdad Gallardo
story-1

Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

 Verdad Gallardo
story-2

Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

 Verdad Gallardo
story-3

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-4

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

 Verdad Gallardo
story-5

Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

 Verdad Gallardo
story-6

Mercedes EQS Gets A Major Update: Everything You Need to Know

 Verdad Gallardo
story-7

5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

 Verdad Gallardo
story-8

Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

 Verdad Gallardo
story-9

10 Most Reliable Mercedes-Benz Models You Can Buy Used

 Verdad Gallardo
Old Nov 11, 2019 | 08:42 PM
  #9  
lkchris's Avatar
MBWorld Fanatic!
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2005
Posts: 6,189
Likes: 242
From: Albuquerque
'10 CL550, '12 GL550
For information ...

Does simply disconnecting the unit create the code or is the code created by turning on ignition with unit disconnected?

I did this to myself by removing the middle seats—-which have built-in airbags—on my GL and can’t recall whether I turned on ignition during the operation.

Needless to say, the second time I installed a trailer controller harness, I just lifted the seats a little to run the harness across, not disconnecting any wiring.
Reply
Old Nov 24, 2019 | 10:32 PM
  #10  
5hundo's Avatar
Thread Starter
Member
10 Year Member
Liked
 
Joined: Jun 2013
Posts: 94
Likes: 5
From: Pike Road, AL
2008 ML320 CDI
Originally Posted by lkchris
For information ...

Does simply disconnecting the unit create the code or is the code created by turning on ignition with unit disconnected?
Yes, simply disconnecting the seatbelt buckle will throw a code. I never turned on the ignition.


Reply
Old Nov 25, 2019 | 03:41 AM
  #11  
Maj. Dundee's Avatar
MBWorld Fanatic!
 
Joined: Oct 2011
Posts: 7,107
Likes: 765
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
Please read the beginning of page 2 in the PDF. And it means that now you must delete any and all code/s that are stored in the SRS Cont. Module.
Attached Files
File Type: pdf
SRS Cont. Module Func.pdf (85.5 KB, 432 views)

Last edited by Maj. Dundee; Nov 25, 2019 at 05:15 AM.
Reply
Old Nov 25, 2019 | 03:42 PM
  #12  
C230 Sport Coup's Avatar
MBWorld Fanatic!
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2002
Posts: 7,265
Likes: 169
From: So. Oregon Coast
C230 Sport Coup + 2006 W164 ML350 + 99 Ford Escort RIP
Inexpensive iCarsoft Scanner will clear it. 90 bucks or so.
Reply
Old Nov 25, 2019 | 04:12 PM
  #13  
5hundo's Avatar
Thread Starter
Member
10 Year Member
Liked
 
Joined: Jun 2013
Posts: 94
Likes: 5
From: Pike Road, AL
2008 ML320 CDI
Originally Posted by C230 Sport Coup
Inexpensive iCarsoft Scanner will clear it. 90 bucks or so.
Some scanners won’t though, so do your homework. Mine wouldn’t.
Reply

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 09:43 PM.

story-0
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-1
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-2
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-3
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-4
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-5
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-6
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-7
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-8
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE
story-9
10 Most Reliable Mercedes-Benz Models You Can Buy Used

Slideshow: From bulletproof sedans to surprisingly tough SUVs, these Mercedes models proved that the three-pointed star can go the distance.

By Verdad Gallardo | 2026-04-08 09:55:49


VIEW MORE