Mercedes W168/W210 - Air conditioning system failure | HELLA
Mercedes
W168/W210
With air-conditioning system/automatic-air conditioning
Air conditioning system failure
The vehicles mentioned above may experience a temporary or complete failure of the air-conditioning system. This is often caused by a faulty pressure sensor.
If the sensor transmits inaccurate measured values to the electronic control unit, the compressor will be actuated incorrectly, or not at all. Proceed as follows to check the pressure sensor:
- Connect a pressure gage to the service ports on the air-conditioning system
- Connect a diagnostic unit to the vehicle and select the "Measured value blocks/parameters" menu
- Read the "actual values" for the sensor and compare them to the high-pressure reading from the pressure gage
If the difference is greater than 2bar, the pressure sensor must be replaced.
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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