Mercedes-Benz ML320. Service manual - part 12

 

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Mercedes-Benz ML320. Service manual - part 12

 

 

Fig. 33: Air Bag System Wiring Diagram (S320, S420 & S500)

 

1998 Mercedes-Benz ML320 

AIR BAG RESTRAINT SYSTEM 1998 AIR BAG RESTRAINT SYSTEMS Mercedes-Benz

  

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1998 Mercedes-Benz ML320 

AIR BAG RESTRAINT SYSTEM 1998 AIR BAG RESTRAINT SYSTEMS Mercedes-Benz

  

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Fig. 34: Air Bag System Wiring Diagram (SLK230)

 

1998 Mercedes-Benz ML320 

AIR BAG RESTRAINT SYSTEM 1998 AIR BAG RESTRAINT SYSTEMS Mercedes-Benz

  

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2000-01 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 air bag modules (located in doors), SRS control 
module, side air bag sensors, SRS warning light, driver knee bolster, passenger knee bolster, and Emergency 
Tensioning Retractor (ETR) seat belt assembly. Additionally, some vehicles may be equipped with head impact 
(curtain type) air bags (located around door windows behind door frame trims). 

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 safety belt is sufficient, only Emergency 
Tensioning Retractor (ETR) is activated if safety belt is buckled. If a moderately severe frontal collision occurs 
exceeding first triggering threshold where protection from safety belt is sufficient, but safety 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 safety belt is 
insufficient, air bag is deployed. ETR is activated if safety belt is buckled. If safety 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. If during a severe frontal collision the power supply is 
interrupted, the driver and passenger air bag can still be deployed, but ETR cannot 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. During a collision, the side air bag will then deploy. 

COMPONENT LOCATIONS 

NOTE:

The following 2000 information represents the latest information available at 
time of publication and may be useful in diagnosing 2001 vehicles. 2001 wiring 
diagrams have been included at the end of this article.

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.

 

2001 Mercedes-Benz ML320 

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

  

 

2001 Mercedes-Benz ML320 

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

  

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