This is a Technical Journal: Climate system, unusual noise when AC compressor is running. Unusual noise from the climate system may be heard when the AC compressor is running. Noise can be described as a streaming sound. See attached soundfile for better understanding. Service: Insulation of the evaporator pipes according the the attached instruction. P3 LHD cars - TJI-498307-4-1-1 For P3 LHD cars its not possible to add the insulation without removal of the complete dashboard in order reach the evaporator pipes. Follow the instruction TJI-498307-4_1_1.