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 · see seatbelts across all vehicles →
Complaints
6
Recalls
0
Avg fix
$500
When does it fail?
Of the 6 seatbelts complaints filed for the 2015 Mercedes-Benz S-Class, here's the actual mileage breakdown — failures cluster heaviest at 25,000-50,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
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…
Had seatbelts trouble with your 2015 Mercedes-Benz S-Class?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
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?
Based on the 6 complaints filed, seatbelts issues most often appear around 52,500 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
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.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2015/Mercedes-Benz/S-Class.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.