Hello all, I have in my Passat 3B 1.6 Bj. 99 interference noise during radio reception with running motor. The original radio VW Radio Beta is currently configured with original loudspeakers. In the case of running motor, especially when driving noises are heard in the form of occasional noise and scratching. The noise can not be assigned to any particular cause and is largely independent of the engine speed, steering or e.g. switched on windscreen wipers and occurs in irregular Ässige, short intervals of about 5 seconds. Sometimes the reception is a bit worse in phases over half a minute, similar to when you are just out of reach of the radio station, and then from one moment to the other the next 2 minutes without errors. If you drive on the highway evenly, the problems occur minimally less often than when driving in the city with frequent load changes, brakes, steering, etc. – but can also be imaginable because you When playing cassettes / USB stick / CD (depending on the radio) there are no noises! Only during radio reception and only when the engine is running! If the engine is switched off, only with the ignition switched on, the reception is flawless. The following has already been done unsuccessfully for troubleshooting and fixing: – Installation of two other original VW Beta radios – Installation of a JVC radio – Replacement of the antenna foot against Original VW spare part – installation of an interference filter – testing of the antenna cable with multimeter: no contact of the mass of the cable to the mass of the remaining car, no short circuit in the antenna cable itself – antenna cable with the JVC radio without phantom feed adapter directly into the radio – brand new original VW antenna cable from the antenna foot via the driver’s cabin directly connected to the radio or phantom feed adapter – ground connection from the minus pole battery to carossier tested – is perfect The problem The error memory of the radio shows the following (with the original antenna): 00856 – Antenna: on the radio 36-10 – Interruption – Sporadic As I said, the provisional exchange of the antenna cable did not show any effect. I am now at the end with my Latin. Does anyone have any idea where the noise could come from?