The invention relates to a coolant circuit, especially an air conditioning system for motor vehicles.

Said coolant circuit has a mechanically driven compressor (12) and a supplementary compressor (26) which is driven by an electromotor (24).

These engines may be naturally aspirated or pressure-charged either using a mechanical pressure-charger or turbocharger.

These engines may be naturally aspirated or pressure-charged using either a mechanical pressure-charger or turbocharger.

These engines can be naturally aspirated or pressure-charged either using a mechanical pressure-charger or turbocharger.

In standard drive concepts with internal combustion engines, the air conditioning inside the vehicle directly depends on the engine operation due to the mechanically driven compressor.

The 2-liter SLK200 Kompressor is equipped with a mechanically driven compressor, which makes it possible to develop a capacity of 163 hp.