CL 63 AMG (216.377) V8-6.3L (156.984) (2008)
Compressor/Pump: Customer Interest
Suspension - ABC Pump Chirping/Whistling at Idle
Date: April 9, 2008
Order No.: P-B-32.50/60a
Supersedes: P-B-32.50/60 dated Nov. 27, 2007
Group: 32
Revision History
Revision
Date
Purpose
a
4/9/08
Model Indicator Updated for Op Code 48 4153
-
11/27/07
Initial Issue
SUBJECT:
Model 216.371/376/377/379, Up to VIN A011647
Model 221.171/176/177/179, Up to VIN A169441, Equipped with Code 487 Active Body Control (ABC)
Chirping / Whistling Noise From ABC Tandem Pump When Vehicle Is Idling
If you receive customer reports in the above model vehicles of a chirping / whistling noise from the area of the Active Body Control (ABC) tandem
pump (engine compartment) when the vehicle is idling, replace the tandem pump with a revised part. Refer to WIS document AR46.30-P-0500SY for
Model 221 except 221.176/179 and 216.376/397. Refer to WIS document AR46.30-P-0500SYA for model 221.176/179 and 216.376/379.
Note:
The noise is caused by an internal throttle for the high pressure oil lubrication of the pump shafts. The noise sounds like a chattering belt and can be
heard most audibly when the engine is warm from outside the vehicle or with the windows open. No steering input should be used in order to isolate
the noise.
Parts Information
Note:
The following allowable labor operations should be used when submitting a warranty claim for this repair. This information has been generated on
April 9, 2008. Please refer to Netstar --> Star TekInfo --> Star Time for the most current labor time allowance.