Lens heating

The lens is heated to ensure the ACC is effective in winter and in poor weather conditions. This system is designed as a resistance heating system with the heating coil integrated in the plastic body of the lens. After the engine start, the lens heating in all ACC shift modes is switched on depending on the ambient temperature.

To prevent the lens body from overheating, the lens heating system is switched off when the interior temperature of the unit exceeds 50 °C. The temperature is measured by the interior temperature sensor of the ACC control unit. The ACC control unit is switched off at a vehicle voltage > 16 V in order to protect the processor.

The lens heating is monitored for faults by the ACC control unit.