Driver rear seatbelt is fully extended and won’t retract. A quick google search shows that this is a common problem with this model.
2015 mercedes-benz S-Class seatbelts problems
moderate 6 complaints filed with NHTSA · avg repair $500
What owners are reporting 2 most recent
BOTH REAR SEAT BELTS DO NOT RETRACT. THIS IS THE SECOND TIME IN 10 MONTHS THAT THE SEAT BELTS WILL BE REPLACED BY MB IN THIS CAR. MB DEALERS STATES THAT IT IS A PROBLEM THAT IS KNOWN AND MB IS WORKING ON A FIX. IN THE MEANTIME THEY ARE REPLACING THE SEAT BELTS WITH A NEW PART, BUT THEY SAID IT MAY GO BAD AGAIN AND MB IS WORKING ON A PERMENANT FIX AND WE WILL BE NOTIFIED WHEN A NEW SEAT BELT IS …
Common questions
How serious is the seatbelts problem on the 2015 mercedes-benz S-Class?
It's a documented issue but not catastrophic. 6 complaints have been filed. Repairs average $500 and most owners catch it before it causes a breakdown.
At what mileage does the seatbelts typically fail?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
What does it cost to fix?
Independent shops typically charge around $500 for seatbelts repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to seatbelts?
No active recalls currently cover seatbelts issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.