I bought a tested RNS-E on Ebay by a company in Germany. The kit included a retrofit wiring harness, not specified for my A4 B6 with Bose sound. When i tested the Navi in the my car, the radio started directly but the display was black. In direct sunlight I can barely see the information on the display. It is like the display illumination has no power supply.
Is the Navigator faulty or could it be the wiring harness?
Is the Navigator faulty or could it be the wiring harness?