12 14 611 Removing/replace knock sensors at left (N63 B40/B44 O 1, S63 B44 T 2)

Necessary preliminary tasks:

Unlock and disconnect connector (1) on both knock sensors.

Release screws on both knock sensors (2).

Tightening torque 13 62 5AZ .

Remove knock sensors (3).

Fig 1: Identifying Knock Sensor Connectors And Screws

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Installation note:

Clean contact surface of knock sensors on engine block.

Fig 2: Locating Contact Surface Of Knock Sensors On Engine Block

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NOTE: Check stored fault message.
Clear diagnostic fault entries from fault memory.