695119 Removing and installing airbag sensor

WM 695119 Removing and installing airbag sensor

Technical values





Preliminary work

Preliminary work for front airbag sensor

For naturally aspirated engines only:
1. Disconnect the battery. -> 2X00IN Work instructions after disconnecting the battery 2X00IN Work instructions after disconnecting the battery.
2. Remove front apron. -> 631519 Removing and installing front apron - section on "Removing"

For turbo engines only:
3. Disconnect the battery. -> 2X00IN Work instructions after disconnecting the battery 2X00IN Work instructions after disconnecting the battery.
4. Remove charge-air cooler. -> 214319 Removing and installing charge-air cooler - section on "Removing"

Preliminary work for airbag sensor in rear inner wheel arch

1. Disconnect the battery. -> 2X00IN Work instructions after disconnecting the battery 2X00IN Work instructions after disconnecting the battery.
2. Remove rear inner door entry guard. -> 680519 Removing and installing inner door entry guard - section on "Removing"

Information

Component information





Installation position of airbag sensor





Removing airbag sensor

Removing front airbag sensor

WARNING

Incorrect handling of airbag units

- Triggering of airbag unit
- System faults can occur

-> Switch off ignition and remove ignition key.
-> A voltage supply (e.g. battery charger) must not be connected to the external power supply/jump-lead starting terminals.
-> Disconnect the battery and insulate the ground strap so that all contact with a ground carrier is avoided.
-> Wait 1 minute after disconnecting the battery.
-> Only pull off connector on the triggering unit after the waiting time has elapsed.
-> Make sure that no foreign objects are located in front of the airbag unit during installation.
-> Replace damaged parts during removal.
-> Always position the airbag unit in such a way that the airbag opening is facing upwards.
-> If removed for an extended period, the airbag unit must be stored in a safe place.
-> Airbag units must not come into contact with grease, oil, detergents, liquids, or similar substances.
-> Do not expose airbag units to temperatures above 90°.
-> Do not remove the short-circuit spring on the plug-in contacts.
-> Ignition and preparations may only be carried out by skilled staff, supervised by a second responsible person.
-> Before disposal, the airbag unit must be rendered harmless by electrical ignition performed in accordance with all precautionary measures, thereby preventing it from being used incorrectly.

NOTICE

Voltage peaks

- Risk of damage to electrical load or to the control unit

-> Remove remote control and switch off ignition before disconnecting or removing electrical load.

Information

Some of the repair illustrations show only one side of the vehicle. Naturally, some steps also have to be performed on the opposite side of the vehicle as well. These must be carried out as a mirror image of the steps shown.

1. Release electric plug connection -a- and unplug it -arrow A-.





Removing airbag sensor

2. Unscrew fastening screw -1- and remove sensor -arrow B-.

Removing airbag sensor in rear inner wheel arch

WARNING

Incorrect handling of airbag units

- Triggering of airbag unit
- System faults can occur

-> Switch off ignition and remove ignition key.
-> A voltage supply (e.g. battery charger) must not be connected to the external power supply/jump-lead starting terminals.
-> Disconnect the battery and insulate the ground strap so that all contact with a ground carrier is avoided.
-> Wait 1 minute after disconnecting the battery.
-> Only pull off connector on the triggering unit after the waiting time has elapsed.
-> Make sure that no foreign objects are located in front of the airbag unit during installation.
-> Replace damaged parts during removal.
-> Always position the airbag unit in such a way that the airbag opening is facing upwards.
-> If removed for an extended period, the airbag unit must be stored in a safe place.
-> Airbag units must not come into contact with grease, oil, detergents, liquids, or similar substances.
-> Do not expose airbag units to temperatures above 90°.
-> Do not remove the short-circuit spring on the plug-in contacts.
-> Ignition and preparations may only be carried out by skilled staff, supervised by a second responsible person.
-> Before disposal, the airbag unit must be rendered harmless by electrical ignition performed in accordance with all precautionary measures, thereby preventing it from being used incorrectly.

NOTICE

Voltage peaks

- Risk of damage to electrical load or to the control unit

-> Remove remote control and switch off ignition before disconnecting or removing electrical load.

Information

Some of the repair illustrations show only one side of the vehicle. Naturally, some steps also have to be performed on the opposite side of the vehicle as well. These must be carried out as a mirror image of the steps shown.

1. Release electric plug connection -a- and unplug it -arrow A-.





Removing airbag sensor

2. Unscrew fastening screw -1- and remove the sensor -arrow B-.

Installing airbag sensor

Installing front airbag sensor

WARNING

Incorrect handling of safety bolts

- Danger of injury
- Loss of torque

-> Always use new fastening screws and nuts following removal.
-> Observe specified tightening torques.
-> Carry out a visual inspection of all re-used parts.

Information

Some of the repair illustrations show only one side of the vehicle. Naturally, some steps also have to be performed on the opposite side of the vehicle as well. These must be carried out as a mirror image of the steps shown.

Information

If a new component (e.g. sensor, airbag control unit, airbag unit) of the airbag system has to be installed, the new component will be supplied with a barcode sticker (tear-off label).





Sample tear-off label shown >> airbag sensor

- Tear off the tear-off label -2- on the new component -1- and stick it under the heading Proof of airbag system check/component replacement in the Guarantee and Maintenance booklet.





Tear-off label

- The replacement date and mileage must be documented and the booklet must be stamped with the dealer's stamp.

Information

- Make sure that the sensor is properly positioned.

1. Position the sensor -arrow B-.





Installing airbag sensor

Information

Always replace the fastening screws and nuts after customer service and reworking. The micro-self-locking screws must not be treated, greased or loosened and then screwed on again.

2. Tighten fastening screw -1- on front airbag sensor to => Tightening torque: 9 Nm (6.5 ftlb.).
3. Plug in electric plug connection -arrow A- and lock it -a-.

Installing airbag sensor in rear inner wheel arch

WARNING

Incorrect handling of safety bolts

- Danger of injury
- Loss of torque

-> Always use new fastening screws and nuts following removal.
-> Observe specified tightening torques.
-> Carry out a visual inspection of all re-used parts.

Information

Some of the repair illustrations show only one side of the vehicle. Naturally, some steps also have to be performed on the opposite side of the vehicle as well. These must be carried out as a mirror image of the steps shown.

Information

- Make sure that the sensor is properly positioned.

Information

If a new component (e.g. sensor, airbag control unit, airbag unit) of the airbag system has to be installed, the new component will be supplied with a barcode sticker (tear-off label).





Sample tear-off label shown >> airbag sensor

- Tear off the tear-off label -2- on the new component -1- and stick it under the heading Proof of airbag system check/component replacement in the Guarantee and Maintenance booklet.





Tear-off label

- The replacement date and mileage must be documented and the booklet must be stamped with the dealer's stamp.

Information

- Make sure that the sensor is properly positioned.

1. Position the sensor -arrow B-.





Installing airbag sensor

Information

Always replace the fastening screws and nuts after customer service and reworking. The micro-self-locking screws must not be treated, greased or loosened and then screwed on again.

2. Tighten fastening screw -1- on airbag sensor in rear inner wheel arch to => Tightening torque: 9 Nm (6.5 ftlb.).
3. Plug in electric plug connection -arrow A- and lock it -a-.

Subsequent work

Subsequent work for front airbag sensor

For naturally aspirated engines only:
1. Install front apron. -> 631519 Removing and installing front apron - section on "Installing"
2. Connect the battery. -> 2X00IN Work instructions after disconnecting the battery 2X00IN Work instructions after disconnecting the battery

For turbo engines only:
3. Install charge-air cooler. -> 214319 Removing and installing charge-air cooler - section on "Installing"
4. Connect the battery. -> 2X00IN Work instructions after disconnecting the battery 2X00IN Work instructions after disconnecting the battery

Subsequent work for front airbag sensor

1. Install rear inner door entry guard. -> 680519 Removing and installing inner door entry guard - section on "Installing"
2. Connect the battery. -> 2X00IN Work instructions after disconnecting the battery 2X00IN Work instructions after disconnecting the battery