Amazon link
https://amzn.to/3Yl5XLf fish rod cut off the end and clean the sunroof drain holes
2012 Audi A5 Most audi audio trouble comes from water damage in the trunk where amplifiers and radio tuners are. they always get wet from sunroof drain holes. When and if you replace any electronic components in these vehicles, you have to program the modules. If you don't, the audio will not work properly. you need special service to program
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