Heating and Air Conditioning

Nominal Values For Pressures And Temperatures

NOTE: The temperature of the air from the centre dashboard vents must lie within the prescribed tolerance range within 5 minutes, depending on the ambient temperature:

General test prerequisites
- Close doors, windows and sliding roof.
- Insert temperature probe into centre vent.
- Measure ambient temperature.
- Open all dashboard vents.
- Switch ignition on.
- Press circulation button.
- Set temperature control to maximum cooling.
- Switch fresh-air blower to stage 4.
- Start engine.
- Operate air condition while idling.
- Set engine speed to 2000 rpm (start of time measurement).

NOTE: If the prescribed nominal values are not reached, the cooling system must be checked for leaks and repaired:







Centre vent temperature as a function of ambient temperature







High pressure in cold circuit as a function of ambient temperature







Low pressure in cold circuit as a function of ambient temperature