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Diagnostic Manual, Chassis and Drivetrain,
Volume 2

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LOCATION:    5.1 Acceleration Slip Regulation (ASR)   >   11 Diagnosis - Function Test

Diagnosis - Function Test

Test step/Test scope Test condition Nominal value Possible cause/Remedy 1)
1.0 Brake torque control circuit Lift rear of vehicle so both rear wheels of vehicle can move freely. Secure vehicle properly.
Selector lever in transmission range "D".
Apply full throttle.
The rear wheels are noticeably braked, simultaneously; the high-pressure/return pump can be heard.
Engine speed is reduced to approx. 1000 rpm.

Engines, Volume 3, section 6.1.
1) Observe Preparation for Test, see 22.