B0049Third Row Right Frontal Stage 1 Deployment Control
- Generic OBD-II code · Body
- How the car detects it
- B0049 marks the stage 1 charge of a right third-row frontal bag, the main charge of a bag that would have to come out of the second-row seatback ahead of it. Daimler's application for a bag mounted behind a front seat and Mercedes-Benz's later design with chambers that bridge a changing seat gap show how such a bag can be built; in series, Mercedes offers rear frontal airbags only for the outer second-row seats of its S-Class and Maybach models. No carmaker documents B0049 and no bulletin cites it. A third-row frontal code on a vehicle without that equipment points to a module set up for the wrong variant. Airbag lamp on.
- What you may notice
- Airbag warning lamp on
- Frontal airbag for the right third-row seat may not deploy
- Safety note: do not probe the airbag circuit yourself; unplug airbag connectors only with the battery disconnected and the stated wait time observed
- Likely causes
- PossibleLoose connector of the airbag lead in the second-row seatback
- PossibleLead strained when the second-row seat is folded or slid
- RareRestraint module configured for equipment the vehicle does not have (wrong part or coding)
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.