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do you have to replace it, or do you send it out to be replaced? I had the same warning light for the rear seatbelts and i had to take the seatbelts out and send those in to have the tensioner replaced. Thanks
When i sent in the rear seat belts for repair it was the part that held the seatbelt and not where the seatbelt locked in. Is this different for the front seats? Is the portion that needs to be sent off and repaired in the locking mechanism of the seat belt or is it in the portion of the seatbelt that comes out of the pillar in between the front and rear doors? Thanks again!
there is a height adjuster down the B pillar linked to the front seat position... no idea how it works someone here once posted about it.... try search?
The area with the height adjuster is the part i am talking about. Is that where the piece is located that would need to be sent out for repair after the accident? I have information on how to take the pillar area apart. I just want to make sure i am spending time taking out the correct part of the seatbelt to send in. Thanks again.
the pyrotechnic bit to tighten the belt for a real crash that makes the airbags go off is
a different bit snatches them tight and resets itself - I believe is in the pillar - as its part of Pre-safe
height change is on all of them and again has something to do with a bowden cable under the seat that runs in to the pillar... I guess its seat out and half the interior trim out
So, the part the seatbelt locks into that is on the side of the seat has a sensor that deploys the airbag? And the part in the pillar contains the part that actually locks the seatbelt during a crash? Do they both need to be replaced to turn off the SRS light in the dash and the SRS warning?
I ask because I had the SRS light for all 4 shoulder seat belts. I replaced the two in the back seat in the shelf area and the SRS light for the two back seatbelts went away. No airbags deployed in the back seat. However, the SRS light is still on for the two front seat belts. The drivers steering wheel airbag went off, but has been replaced.
QUESTION:
Do i need to replace the part in the pillar and the part attach to the side of the seat to get the SRS light off, or just the one part in the pillar which contains the part that locks the seatbelt?
if an air bag went off the module is meant to be replaced and sent back to merc for them to review - for them to glean real crash data
it is possible to bodge up the module and reset its brain - but others claim it might never behave correctly in another crash - when in this deep you need the right tools to go through all the bits to get the car happy
Is there a way to use a multi-meter to test the part that is in the pillar with the actual seatbelt that gets tightened and the part that is attached to the seat where the seatbelt clicks into, but test them after you remove them? Like using the Ohm meter or something. I am curious if there is a way to test if there is one or the other, or maybe both, that is maybe causing the SRS light in the dash. Wondering if there is a way to rule either out prior to sending it out. Thanks.
that’s what XENTRY DAS is for - you can't play with simple checks on modern cars - they built a tool for dealership that's painting by numbers... (still needs lots of skills to understand how to follow) but not going to get anywhere with this type of faults on a forum
I ordered a new seatbelt and installed in for the passenger front and the SRS did not go off. When i did have the seatbelt removed and drove the car while i waited for the new seatbelt it gave a presafe warning when the seatbelt was not plugged in. Installed the new seat belt and presafe went away, but SRS light remained. Code seems to be only for drivers side, but i am assuming the issue is also impacting passenger side. I also was able to get a code off the SRS section which is in the attached pictures. Based on the code and the research, it seems the faulty part may actually be the part where the buckle goes.
Which you posted here.
Question:
Is there a way to get the buckle part that is attached to the seat without removing the seat?
Last edited by Com1ngInClutch; Feb 19, 2025 at 08:51 PM.
whatever joke they use as a switch to know if the seatbelt is clipped in or not - is a known point of failure on Mercedes going back years
WSS is a USA mkt fat bloke weight sensor - it was not a part of early European cars, because Europeans have the mental capacity to recognise if you come to rapid halt at anything greater than 30 mph without a seatbelt - its possible to make an uncomfortable trip through the windscreen. Some men might get a thrill trying this - but many are not so keen it happens to an attractive partner...
To combat - for those with a passion to exercise a right to get hurt - the USA cars have the set of scales which is the WSS in the seat squab foam - it checks if its a light person and inflates a giant air bag less than if it detects some one vastly overweight - of course they will still die when a car stops abruptly slowing rapidly from any crash over 50 mph - but, they might not fly through the screen as fast - and thus are less likely to kill someone else (when they would otherwise crash through both theirs and another car's windscreen)
Is there a way to get the buckle part that is attached to the seat without removing the seat? It looks as if it is one bolt and then a post it slides over, or is it two screws? It looks like i can get to one of them for sure. Hoping there is only one screw. Thanks
i have replaced both the seatbelt and the buckle on the passenger side and the SRS front right light in the dash is still there. However, when I check with the MBII scanner, it does not show any codes for the passenger side, only the drivers side buckle squib. I was going to try and replace the drivers side first due to the code it is throwing, but the part i ordered arrived damaged. So, due to this i was left with trying to replace the passenger side.
QUESTION: Is it possible there is nothing wrong with either the seatbelt tensioner or the buckle squib on the passenger side and it just needs to have the SRS stuff reset? I have tried clearing the codes on the MBII but they do not go away.
there is also a code for a component of control module WSS is defective and the other is component of control module WSS is faulty. Which is apparently the weight system in the seat. Is it possible whatever this is could be causing the SRS codes?? Why would this be an issue if there was no one in the passenger seat?
Thanks again.
Thanks again.
Last edited by Com1ngInClutch; Mar 4, 2025 at 07:05 PM.
Was able to get an replacement drivers side buckle ordered. I was able to get the old one at least unplugged and plugged the new one back in. Went for a little drive and the SRS light for drivers side went off. I checked with scanner and now the only SRS warning is for drivers side WSS system. Contacted the dealership and they reset the WSS for 265$. Will update again once the car is back from the dealership. But it looks like a good chance that after resetting the WSS system the SRS lights will all be gone. THANKS!!!
Took the car to the dealership and they were able to successfully recalibrate the WSS for the front passenger seat. At this time all of the SRS lights are off in the dash and the car seems to be problem free at the moment.
Total cost for the WSS recalibration was 269$. Not bad at all i must say.
Shout out to everyone who added to the thread and thank you for your time.
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