After a service, I was having the engine bay of my RS pressure washed; when fallen near the front bumper I noticed a black plastic cap sort of a thing with a spline in the centre. Its around 1/2" in diameter and again about 1/2" deep. On top is the VW/Audi logo and the serial no. 014.301.485. Can anyone tell me where it could have come from? Thanks. Bomi.

After a service, I was having the engine bay of my RS pressure washed; when fallen near the front bumper I noticed a black plastic cap sort of a thing with a spline in the centre. Its around 1/2" in diameter and again about 1/2" deep. On top is the VW/Audi logo and the serial no. 014.301.485. Can anyone tell me where it could have come from? Thanks. Bomi.

Could be the cap off the air con. There is a pipe that sticks up from the left of the radiator could be that mine came off when I was installing my HID's.

its a cap off the gearshift housing, theres a little breather valve on it and this must be the cap off the top of that

its part 17 on this drawing.

Gents, many thanks for your reply. I had to go out of town suddenly, and read your replies today. Cheers.