11 00 039 Checking Compression of All Cylinders (N55)

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Special Tools Required:

IMPORTANT: High Voltage - Danger To Life!
Interrupt Power Supply To Ignition Coils.
Read and Comply with Notes On Compression Test.

Necessary Preliminary Tasks:

Remove SPARK PLUGS .

Unscrew Tip (1) From Special Tool 11 0 222 .

IMPORTANT: Then Check The Schrader Valve That Is Now Visible for Secure Seating.

Fig 1: Identifying Special Tools

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Prepare Special Tool 11 0 222 In Conjunction with 11 8 732 and 11 8 731 .

Fig 2: Identifying Special Tools 11 0 222, 11 8 731, 11 8 732

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Screw Special Tool 11 0 222 Into Special Tool 11 8 731 To 10 Nm.

IMPORTANT: Oil Thread On Special Tool 11 8 731 .

Fig 3: Attaching Special Tools

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Screw Special Tool 11 0 222 By Hand Into Spark Plug Thread and Connect Special Tool 11 0 224 .

Depress Accelerator Pedal and Actuate Starter Until Compression Pressure Stops Rising.

NOMINAL VALUES , Compression Pressure

Fig 4: Screwing Special Tool 11 0 222 Into Spark Plug Thread and Connecting Special Tool 11 0 224
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Assemble Engine

Delete Fault Memory.