The system is equipped with various sensors and controls so that it does not go beyond the operating modes. Additionally, when the system is turned on, idle speed is increased to compensate for the extra engine load required to run the compressor. An electronic sensor monitors the speed difference between the engine and the compressor, so that when the difference increases, when the compressor fails, disconnect the compressor clutch and thereby protect the drive belt.
Although the refrigerant itself is not toxic, in the presence of an open flame (or a lit cigarette) it forms a highly toxic gas.
Do not heat the refrigerant lines above 110°C, for example when welding or drying paint.
Do not turn on the air conditioning system if it is known to be low on refrigerant, as the system may become unusable.
Note: The electronic air conditioning control system can only be tested with special equipment. For this reason, all questions regarding the incorrect operation of the air conditioning system should be addressed to a Mercedes-Benz service station. For a description of checking the refrigerant level, refer to Chapter 1.
Warning: The refrigerant is under high pressure in the system. The refrigerant is potentially hazardous and should only be handled by trained personnel. Refrigerant coming into contact with the skin may cause frostbite. In the presence of an open flame, the refrigerant forms a highly toxic gas. Uncontrolled release of refrigerant from the system is dangerous and harmful to the environment. For these reasons, disconnecting any part of the system without specialized training and equipment is not recommended.