B00E1Third Row Right Seat Belt Pretensioner B Deployment Control
- Generic OBD-II code · Body
- How the car detects it
- On the right seat of the third row, B00E1 stands for a B-stage tensioner whose firing loop shows an open, a short or an out-of-window resistance. In no public service document does a manufacturer use B00E1. Where Mercedes-Benz fits a right third-row tensioner, it is the retractor, and the airbag unit reports it as B00E6 (LI54.21-P-070658, versions of March and June 2020). A B stage there would be a buckle or anchor device; NHTSA's 2013 study of pretensioners explains how a buckle unit drags the buckle down by a cable when its charge fires, and GM lists buckle, retractor and anchor units as the three possible types. Expect a lit airbag lamp and no tensioning from this stage until the loop is repaired.
- What you may notice
- Airbag lamp on in the instrument cluster
- Occupant at the right of the third row gets no B-stage tensioning
- Safety note: the tensioner contains a pyrotechnic charge; only work on it de-energised (battery off, wait time) and leave it to a specialist workshop
- Likely causes
- LikelyConnector of the right third-row buckle or anchor tensioner not fully seated
- PossibleWiring under the cargo floor or side trim pinched or damaged by loads
- RareRaised contact resistance at the airbag module plug
- RareDefective squib inside the tensioner
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €80 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.