What a headache to install, but it's not the filter's fault. 2008 Audi S6 requires removal of glove box. Then you need to stretch a little and do a few gentle pull-ups and thrusts. I assume the A6s work the same way. HOWEVER, the big $$$ savings of having a retailer, let alone an Audi dealership, does the job. Do yourself a favor and watch YouTube videos and do it yourself or ask a friend for help (beer should be a nice treat).
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