The B9 A4 and S4 comes with quite underwhelming trunk illumination which is fine, as long as you only put your stuff on the left side of the trunk.? There is one light on the driver's side and nothing but a cutout where a light housing should be?on the passenger's side.? We were frustrated so we?designed a custom harness and coupled it with a matching Genuine Audi LED light housing for true OEM level integration.? Since the harness includes OEM connectors, it clips in line with the factory harness/light housing and requires no splicing or permanent changes.? Once routed through the parcel shelf, attach the light housing and snap in the existing cutout hole.? Brilliant!??
See our installation PDF below for direction on how to route the wire.?