Technical Bulletin (Climatronic with Heat Pump - Sporadically Too Low Heating or Cooling Performance):
The customer may complain that the cabin heating or cooling output is insufficient. Software-related deviation in thermal management control unit. The document contains the procedure to update the software of the Thermal Management control unit. The document also contains Warranty information in order to inquire if a vehicle is covered for the service. It contains the tool numbers of the tools needed to service the issue
