Just find a scrap yard that lets you pick the part yourself. It will be like new and cost you no money. These cars are now in most scrap yards...or find a yard that will remove it for you.

Do not disconnect the battery. Unplug any wire at the belt..It's possible that the seat was slammed down and the plastic broke..

 

Cheers Devours! Appreciate the advice. I have purchased the part cheap from a local scrap yard

Now comes the installation. Just wondering (as I've searched it up on the Mercedes WIS software and unfortunately it doesn't provide screw driver/bolt/torx information), but do you know what torx piece I need to unscrew the buckle from the seat backing and what I should use to hold the rear bolt in place when re-fastening the piece? See image below for reference.

Again, thank you for the advice.

Pic of torx piece:

Pic of bolt in the rear:

 

I've never had it apart but here is what my B looks like from the left side door looking in at my belt buckle.

Here are a few views...Have the car off ..no key in ignition. You might have to lift a safety tab on that yellow plug before it comes apart. (I'm not sure as I've never touched them)

Torx ..T-50 will fit that large screw. This set of Torx costs no money here in Canada ($9.99 to $19.99 CDN depending on the sale at that moment) and is offered at our Canada wide "Canadian Tire"..because buying each separate socket when needed will be very costly.

Your large auto stores..or Walmarts..etc..should also have great deals from time to time..


Remember that the spring has an exact fit and it might take a bit of fiddling to place it right. Be careful as there might be some spring back and it could jump off as you remove it.

I hope that your car looks very similar to my views on my B.

 

Thank you for your amazing assistance Devours!

The install was a success, with no warning or error messages displaying!

Much appreciated!

 

Thanks for posting this!

But how do I remove the middle buckle. It is still locked in place after removing the torx bolt. The back left buckle came free, but I don't know how to get the middle free?

 

As said, I've never had to remove anything here. Maybe this thread will give you different views of similar seat belts...read all 7 replies with diagrams and pics. Do an advanced search here in BW and keep going further back as I just did to find this. Let us know what works for you ...if anything actually does.

https://www.benzworld.org/threads/rear-seat-belt-long-anchor-bolt.3145292/?post_id=18793168&nested_view=1&sortby=oldest#post-18793168

 

Its easy job according WIS...
Please look .pdf in attach.
Cheers

 

Only trick there is the removal of the rear seat backrest. Hopfully that's also very easy. It always seems so easy until you get into it.

This time, maybe it is.