Clogged sunroof drains can allow water to enter the interior and accumulate under the carpet where various control modules are mounted. Over time, the accumulated moisture can damage the control modules.Google+
Car Problem Reports
Audi Allroad Quattro Water From Clogged Sun Roof Drains May Damage Control Modules
Audi Allroad Quattro Problem
Visitor, 2001 Audi Allroad Quattro
Rear passenger floorboard is flooded.
leaking water from drain plenums most likely cause of Transmission Control Module failure. Car sat at dealer for 2 months while they waited for authorization from Audi USA to repair it without charge. They never told me it was from water damage, because of the drain plenums clogging. will look up mileage when this occurred