Auxiliary motor vehicle heater

摘要

An auxiliary motor vehicle heater (10) is provided with a control device (22) which has a connection (30) for a voltage supply line (32) which leads from the battery (34) of the motor vehicle to the control device (22). In order to especially more easily determine information for an auxiliary motor vehicle heater (10) about the operating state of the engine (36) of the motor vehicle, the control device (22) is set up to detect the voltage characteristic on the connection (30) and to determine the information "starting of the engine (36) of the motor vehicle is completed" depending on the voltage characteristic.