I have a 2005 Audi A4 1.8T. After it either rains or my car is washed, it has a mold smell inside of the passanger compartment. The vehicle shows no evidence of water entering into the passanger compartment. The vehicle has not been in an accident and is in excellent shape. Cabin filter?
SOURCE: Audi A4 need to replace rear brake light on audi a4
Inside the boot is a plastic cap embeded in the boot liner. Remove the cap to reveal a screw. Undo the screw and the whole rear light cluster will come away in a sideways and not rearward direction to reveal all of the bulbs. Hope this helps.
SOURCE: Audi A4 1.9 TDI 130BHP engine power loss when it's raining
I know it sounds funny, but check the air flow sensor. They had issues on all models with 100 and 130 bhp turbocharged diesels from audi/volkswagen.
SOURCE: 2000 Audi a4 headlight bulb replacement
At least on the driver side, there really is no reason to remove the entire headlight assembly. I was able to swap out the bulb fairly easily but simply removing the dust cap, popping the connector off the bulb, and then undo the clip holding the bulb in place. The just reverse order to install the new bulb. Took about 3 minutes.
SOURCE: 2005 Audi A4 1.8 Fuel Pump problem?
I had an Audi A4, 10 years older than yours mind you, but it would start then stop, sometimes 10 times but would eventually go. I ran a little WD40 in the key barrel and put the key in and out a couple of dozen times. Wiping it with a cloth each time, lots of dirt came off. My theory and it's only mine, is that the wear on the key left dirty metal deposits inside which stopped the chip in the key being recognised. I believe they had a security chip inside the key.
Anyway after 6 months of this nuisance it never happened again after that. Fixed my problem and a lot of frustration. Maybe help you too.
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