11 00 039 Checking compression of all cylinders (B48, B46)

Special tools required: 

• 11 0 222
• 11 8 732
• 11 8 731
• 2 410 242

Necessary preliminary tasks: 

• Reading out the fault memory
• Rectify faults
• Delete fault memory
• Remove SPARK PLUGS

Unscrew tip (1) from special tool 11 0 222 .

Attention  !

Then check the Schrader valve that is now visible for secure seating.

Fig 1: Unscrewing Tip From Special Tool (11 0 222)

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Prepare special tool 11 0 222 in conjunction with 11 8 732 and 11 8 731 .

Screw special tool 11 0 222 into special tool 11 8 731 to 10 Nm. 

Fig 2: Screwing Special Tool (11 0 222) Into Special Tool (11 8 731)

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Disconnect plug connection A46*6B on the DME control unit.

Fig 3: Locating Plug Connection A46*6B On DME Control Unit

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Connect special tool 2 410 242 to special tool 11 0 222 with the bayonet fitting.

Screw in the 100-bar sensor (1) on the special tool 2 410 242 hand-tight.

Connect 100-Bar sensor (1) with the Integrated Measurement Interface Box.

Fig 4: Screwing 100-Bar Sensor On Special Tool (2 410 242)

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Illustration: N74.

Screw special tool 11 0 222 by hand into the spark plug thread.

Fig 5: Screwing Special Tool (11 0 222) Into Spark Plug Thread

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Follow diagnosis instruction.

Diagnosis path:  Drive -> Motor Electronics -> compression test.

Fig 6: Screen Display - Compression Test

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Required follow-up work: 

• Delete fault memory