Checking compression of all cylinders (S55 engine)

Special tools required: 

• 11 0 222
• 11 0 224
• 11 8 731
• 11 8 732
• 13 6 052
• 11 4 310

Unscrew tip (1) 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.

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

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Connect special tool 11 0 222 to 13 6 052 and 11 4 310.

Tightening torque. 8 Nm.

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Screw in pressure sensor 81 38 0 431 592 manually with special tool 11 4 310.

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Release screw (1) on compressor outlet, cylinder 1-3.

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Release screw (1) on compressor outlet, cylinder 4-6.

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Release hose clips (1 and 2).

Pull off pressure pipe (3).

Disengage cable from holder (4).

Pull off pressure pipe (5).

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Necessary preliminary work: 

• Remove SPARK PLUGS .

Screw prepared special tools (1) into cylinders according to diagnosis information.

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Compression check, electronic  .

Connect ISID and IMIB (Integrated Measurement Interface Box) (1).

Follow diagnosis instruction.

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Assemble engine.

Clear diagnostic fault entries from fault memory.