E 350 V10-6.8L (2007)
Seat Belt Tensioner: Description and Operation
SAFETY BELT PRETENSIONERS
As part of the supplemental restraint system (SRS), the safety belt buckles are equipped with pretensioners. The safety belt buckle pretensioners remove
excess slack from the safety belt webbing. The pretensioners are activated by the RCM when the module detects an impact event exceeding a
programmed limit and the safety belt is latched (connected).