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Home >> Mercedes Benz >> 2021 >> GT 53 AMG >> Repair and Diagnosis >> Accessories & Equipment >> Seats >> Seats, Bunks, Restraint Systems (1 Of 3) -- 290 Chassis >> Basic Knowledge >> Supplemental Restraint System Function - GF91.60-P-0003FR

Supplemental Restraint System Function - GF91.60-P-0003FR

Model 257, 290 up to Model year 2021 

G16550386Courtesy of MERCEDES-BENZ USA

Block diagram 

Function requirements, general 

IMPORTANT The electronic ignition lock control unit sends the status of circuit 15 over the user interface CAN to the Supplemental Restraint System control unit.

IMPORTANT After circuit 15R is switched off, parts of the Supplemental Restraint System remain active for a certain run-on time.

IMPORTANT The Supplemental Restraint System control unit provides a power reserve for at least 300 ms if the battery has been disconnected.

Supplemental restraint system, general information 

The supplemental restraint system is intended for occupant protection and with CODE U60 (Active engine hood (Pedestrian protection)) for pedestrian protection.

IMPORTANT The belt is prevented from extending in certain situations, irrespective of the status of the Supplemental Restraint System.

The Supplemental Restraint System function consists of the following subfunctions, which are described in separate documents:

  Pedestrian protection function Model 257
up to Model year 2021
with code U60 (Pedestrian protection - Active hood)
GF91.60-P-1005FR 
  Passenger-side seat occupied recognition function   GF91.60-P-1100FR 
  Actuate supplemental restraint system, function   GF91.60-P-2012FR 
  Overview of system components for supplemental restraint system   GF91.60-P-9996FR