Body, generic

B00E5 Second Row Center Seat Belt Pretensioner C Deployment Control

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B00E5 covers a C-stage tensioner at the middle seat of row two. No manufacturer publishes it. Rear centre tensioners are scarce: Mercedes' 2017 GLS manual names tensioners only for the outer second-row belts, and the Mercedes bulletin that assigns B00E3 and B00E4 to the outer rear retractors has no centre entry. IIHS research on rear occupants (2020) states that belt countermeasures for the rear are available yet rarely fitted, so such slots often stay empty. If a vehicle does carry a centre retractor or buckle tensioner, the airbag module watches its squib like any other and sets B00E5 for an open, a short or a resistance drift; the warning lamp then comes on and that seat loses its tensioning.

Likely causes

Centre-seat tensioner plug under the rear bench not engaged
Module coded for a centre tensioner that the vehicle lacks
Lead damaged where it passes the split or folding rear bench hinge

Symptoms

  • Airbag lamp on
  • Rear centre passenger may not be held back early in a frontal crash
  • Safety note: the tensioner holds a pyrotechnic charge – battery off, wait time observed, repair at a specialist workshop

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€60–700
Time0.3–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

second row center pretensioner csquib circuitsrs control module

Related codes

B00E3B00E4B0074B007DB0054

References: mbusa.com, iihs.org, crashstats.nhtsa.dot.gov, gmstc.com.