Removing and installing (replacing) the control unit for the regulated rear axle differential lock (GHAS)

Attention! 

Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DAMAGE (ESD PROTECTION) .

Removal: 

Remove flap (1).

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Unlock all connectors (1) on control unit (4) and disconnect.

Slacken both nuts (2).

Release both nuts (3) and feed the control unit (4) out of the bracket.

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Installation: 

Feed control unit (4) into the bracket.

Attach both nuts (3) and tighten.

Tightening torque 61 35 9AZ .

Tighten both nuts (2).

Tightening torque 61 35 9AZ .

Connect all connectors (1) to control unit (4).

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Close and lock flap (1).

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Replacement: 

• Carry out VEHICLE PROGRAMMING/ENCODING .
• Perform start-up.