[MatthewH]

I've just done a service on my D4 4.2L TDI. According to all of the Audi documentation I can find, this engine holds 9.5L as mentioned above.

I have somehow managed to drain 13.5L from mine! The car has a full Audi main-dealer service history too - until now at least!

Even more strangely, the car has recently been displaying a warning which says "Engine oil low, add up to 1L, you may continue driving".

I have refilled 9L of oil and will see what the MMI system says after a short drive in the morning...