What's Making This Noise?

[cappuccino]

I reckon it is this:
Polo 77tsi Rattle - Fuel lines?
ratelende dash stationair -> OPLOSSING!

I had this on a petrol but it only occurred on idle with air con off, it also came and went, it was basically the fuel line rattling against the chasis. When I isolated the source, I could make the noise come and go by moving the fuel line back and forth.

I'm 95% sure as the noise sounds exactly like what I had.

I'd imagine it is the same with the diesel.

You can either move the line to the second mounting point, or cable tie the fuel line to stop it from moving out of position.

*** EDIT: o well if you have driving issues then yeah it would be more serious ***