Reading stored trouble codes

On the microclimate control unit, simultaneously press buttons 10 and 13 for no more than 2 s, then press button 12 within 1.5 s. Stored faults are displayed on the display of the interior air conditioning control unit, and for safety reasons they should be recorded. As a result of pressing button 4, the information in the fault code memory is erased and the diagnostic mode ends. To exit the diagnostic mode without erasing the trouble codes, press any other button on the microclimate control unit.