Mercedes-Benz CLK - Faulty air conditioning compressor | BEHR HELLA
Mercedes-Benz
CLK (W209)
Model years: 2002 to 2006
Operating noise from the air conditioning compressor pulley
If there are complaints for these vehicles that noise is coming from the area of the air conditioning compressor, a possible cause is the air conditioning compressor pulley. To avoid possible misdiagnosis (e.g. compressor damage), check using a test belt (v-ribbed belt) to pinpoint the source of error. Test belt for the fault diagnosis: 6PK2315 / approx. 2315 mm.
Remove the original v-ribbed belt and attach the shorter v-ribbed test belt such that the air conditioning compressor pulley remains empty (see figure). Let the engine run and listen for the undesired noise. If the noise can no longer be heard in the area of the air conditioning compressor, install a new air conditioning compressor pulley. In addition, check the peripheral parts (belt tensioner, vibration damper, tensioning arm, tension roller, deflector, and guide roller) and replace if necessary. Finally, install the original v-ribbed belt and perform the final check.
Important safety note
Technical information and practical tips have been compiled by HELLA in order to provide professional support to vehicle workshops in their day-to-day work. The information provided on this website is intended for use by suitably qualified personnel only.
Reprinting, distribution, reproduction, exploitation in any form or disclosure of the contents of this document, even in part, is prohibited without our express, written approval and indication of the source. The schematic illustrations, pictures and descriptions serve only for the purposes of explanation and representation of the instructions and cannot be used as a basis for installation or assembly work. All rights reserved.
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