11 78 530 Replacing left control sensor (S63)

Special tools required: 

• 11 7 020 .

Only perform this work after engine has cooled down.

Necessary preliminary tasks: 

• Check function of DME.
• Switch off ignition
• REMOVING ENGINE COVER .

Unclip control sensor cable at retaining clips (2).

Fig 1: Identifying Retaining Clips

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Unclip control sensor cable (2) at retaining clips (3).

Unlock plug connection and detach.

Fig 2: Identifying Control Sensor Cable And Retaining Clips

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Release control sensor with special tool 11 7 020 .

Fig 3: Removing/Installing Control Sensor

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Installation note: 

The threads of new oxygen control/monitoring sensors are already coated with NEVER-SEEZ COMPOUND .

If a lambda control/monitoring sensor is to be reused, apply a thin and even coating of Never-Seez Compound to the thread only.

The part of the lambda control/monitoring sensor which projects into the exhaust branch (sensor ceramics) must not  be cleaned and not  coated with lubricant.

Secure control sensor with special tool 11 7 020 and a torque wrench.

Tightening torque 11 78 1AZ .

Fig 4: Removing/Installing Control Sensor

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Installation note: 

Check function of DME control unit.

Pay attention to cable routing of control sensor.