I am not familiar with the A6 specifically but the A4s have several electronic
controllers under the floor mats and susceptible to corrosion when the floors
are flooded due to a clogged battery drain directing water to the interior floor.

Best to pull the carpets and dry any electrical components. Try using CRC tuner
cleaner from electronics shop to clean / dry and protect wiring.

Ian Gaskell wrote:
> Lots of rain recently. Came out to my car, sat in and put my feet in about
> 2 inches of water. Opened bonnet and the battery chamber was almost full to
> overflowing. Managed to push out a grommet in the vicinity of the battery to
> drain it & eventually got water out from front & rear driver side footwells
> (UK Right hand drive car,,,) More or less dried everything out, but seems
> to have left me with a few electrical gremlins
>
> 1. Electric windows do not work.
> 2. Alarm does not arm, or at least the direction indicators do not flash on
> locking the car
> 3. All interior lights no longer work. Courtesy and reading lamps
>
> All the fuses in the panel at the driver door side of the dash are intact.
> Are there any boxes of electronics on the floor, or low down near the floor
> behind any side trims that are associated with any of the functions affected
> ? Is the central locking control unit perhaps common to the problems? Where
> is it located ? The wiring diagrams show the supply to all the interior
> lights coming from it. Door switches are associated with both alarm and
> courtesy lamps I guess.
>
> Any sugestions folks ?
> Ian
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