Wiring harness and coding key for converting Tempmatic code HH9 to Thermotronic code HH4 for Mercedes Benz Sprinter 907/910 A comfortable and constantly regulated interior climate The temperature, ventilation intensity and air distribution are monitored and constantly adjusted according to the conditions The package includes: Coding key Wiring harness Note: The coding key can only be used for one vehicle Only suitable for vehicles with semi-automatic Tempmatic air conditioning (code HH9) Vehicles with roof air conditioning (code HK4) on request The switching block, temperature sensor and, optionally, the sun sensor are also required