Why does my Audi A6's engine stall while idling?

I have been experiencing issues with my Audi A6's engine stalling while idling. It seems to happen randomly and is becoming more frequent. I have had the car checked by a mechanic and they were unable to find any issues. Any insights or recommendations on what may be causing this issue?

It could be due to a faulty fuel pump or a clogged fuel filter. I suggest getting them checked and replaced if necessary. Also, don't forget to regularly clean the throttle body and idle control valve.

I had a similar issue with my A6 and it turned out to be a faulty crankshaft position sensor. It's a relatively inexpensive part to replace and should fix the stalling issue.

I recommend checking the spark plugs and ignition coils. They can cause stalling if they are worn out or malfunctioning. It's a good idea to replace them every 50,000 miles for optimal performance.