Audi 2005 A6 4.2 Flooded cabin,Navigation not working....help!

The water leaks inside through the firewall in the cowl beneath the windshield wipers. Look up underneath the dash from the floor with a light. If I can't get to the leak I pour a liquid sealer into the cowl in that area on a DRY day. It might take a few tries to seal it.

My first guess would be that the heater core is bad, usually a very hard job to replace.

Have you ever replaced the cabin air filter (AKA pollen filter) I would suggest you do that and see if it cures the low air flow problem. If the problem persists then you may have an obstruction at the cabin air intake area like a plastic bag.

Could be either one or a hose at is leaking. I check for leaks using a paper towel and wiping areas I suspect are leaking.

Your navigation drive died. I can help you, please send me an e-mail. [email protected]

Best regards
Gabor

I own a 2004 LS. You didn't get water into the PCM,because of rain or anything else. The PCM is behind the glove box,only the connectors are in the engine compartment and their under the housing for the cabin filter. They won't even get wet from rain.

The battery could fail any time,after say three years,for any reason.

Don't know about warranty,ordered mine from factory in 03.

Here' s trick to find water leaks into cabin area,.
Mix a quart of water with a tablespoon of Murphy's Oil Soap (won't harm finish on car) liquid, mixing gently just to mix but not foam.
Start car, and place blower fan on full setting. Close all windows and other openings to try to help increase positive air pressure inside cabin compartment
Get out of car with fan blowing (engine can be running but make sure you don't lock yourself out of car) and gently pour solution on suspected areas. If there's a leak opening, the air from cabin will cause bubbles indicated leak point.
Also raise hood and use solution on fire wall where there are seams and sealant applied. I've seen these be leaks soaking the driver's side floor mats.

If you find a leak, seal it with the best clear silicone caulk, generally about $7 a tube. Clean all areas to be sealed thoroughly of any dirt, oil, grease, or loose rusted metal.

Good Luck

try this site
www.radio-code.co.uk

We had to remove the glove box first then on the centre consol there is a small removal plate, remove this and locate the filters. There are two .