RS 4 Quattro Cabriolet V8-4.2L (BNS) (2008)
Trunk/Liftgate Sensor/Switch (For Alarm): Service and Repair
Trunk Lock/Alarm/Central Locking Switch, from 11.04
The rear lid contact switch is integrated with the rear lid lock - arrow - and cannot be serviced or replaced separately.
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Replace rear lid lock.