Mercedes-Benz ML320. Service manual - part 37

 

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Mercedes-Benz ML320. Service manual - part 37

 

 

Fig. 73: Air Bag System Wiring Diagram (2001 S430 & S500-1 Of 2)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

 

2001 Mercedes-Benz ML320 

2000-01 ACCESSORIES/SAFETY EQUIPMENT Mercedes-Benz - Air Bag Restraint Systems

  

me 

 

 

2001 Mercedes-Benz ML320 

2000-01 ACCESSORIES/SAFETY EQUIPMENT Mercedes-Benz - Air Bag Restraint Systems

  

me 

 

Fig. 74: Air Bag System Wiring Diagram (2001 S430 & S500-2 Of 2)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

 

2001 Mercedes-Benz ML320 

2000-01 ACCESSORIES/SAFETY EQUIPMENT Mercedes-Benz - Air Bag Restraint Systems

  

me 

 

2003 ACCESSORIES/SAFETY EQUIPMENT

Mercedes-Benz - Air Bag Restraint Systems 

DESCRIPTION & OPERATION 

All models are equipped with Supplemental Restraint System (SRS). The main components of SRS are driver-
side air bag module, passenger-side air bag module, side impact air bag modules (located in doors), SRS control 
module, side air bag sensors, SRS warning light, driver-side knee bolster, passenger-side knee bolster and seat 
belt pretensioners or Emergency Tensioning Retractor (ETR) seat belt assembly. Additionally, some vehicles 
may be equipped with head impact (curtain type) air bags. 

Both SRS and ETR are electronically activated by a single control module. There are 2 thresholds which must 
be exceeded to trigger an ETR action, air bag deployment, or both. If a moderately severe frontal collision 
occurs exceeding first triggering threshold where protection from seat belt is sufficient, only Emergency 
Tensioning Retractor (ETR) is activated if seat belt is buckled. If a moderately severe frontal collision occurs 
exceeding first triggering threshold where protection from seat belt is sufficient, but seat belt is not buckled, air 
bag is deployed and ETR is not activated. 

If a severe frontal collision occurs exceeding second triggering threshold where protection from seat belt is 
insufficient, air bag is deployed. ETR is activated if seat belt is buckled. If seat belt is not buckled, ETR is not 
activated when second triggering threshold is reached. Passenger air bag will deploy even if passenger seat is 
not occupied when a triggering threshold is exceeded. During certain types of collisions, the air bags will be 
deploy, but ETRs will not be activated. 

The side air bag on the driver-side deploys whenever the driver-side air bag module is deployed and when there 
is a substantial side impact crash. The air bag on the passenger-side will activate only when a sensor (Occupied 
Seat Recognition Sensor) in the passenger seat sends a signal to the SRS control module that the passenger-side 
seat is occupied. Side air bags mounted in rear doors will deploy when side impacts occur that exceed preset 
parameters. 

Head impact air bag modules will deploy when certain side impacts occur that exceed preset parameters. Head 
impact air bag will deploy independently of other air bags on side of impact. 

COMPONENT LOCATIONS 

COMPONENT LOCATIONS 

WARNING:

Accidental air bag deployment is possible. Personal injury may result. 
Read and follow all WARNINGS and AIR BAG SAFETY PRECAUTIONS 
before working on air bag system or related components.

Component

Location

AIR BAG warning light

Instrument Panel Cluster

Clockspring

Under steering wheel

Driver-side air bag module

On steering wheel

Emergency Tensioning Retractor (ETR)

Driver-side & passenger-side lower B- & C-pillars

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2003 Mercedes-Benz ML320 

2003 ACCESSORIES/SAFETY EQUIPMENT Mercedes-Benz - Air Bag Restraint Systems

  

 

2003 Mercedes-Benz ML320 

2003 ACCESSORIES/SAFETY EQUIPMENT Mercedes-Benz - Air Bag Restraint Systems

  

me 

 

me 

 

 

 

 

 

 

 

 

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