It's the usual thing - fix one thing and two more pop up.

This time it's what appears to be a leaking rad. While replacing the indicator bulbs I noticed a cloudy deposit on the cam cover which easily wiped away. Strange. Then I saw the middle, as in top to bottom, or the rad appeared a darker colour than the rest and closer inspection showed it to be damp. Sure enough, coolant level has also dropped slightly.

Plenty of options for a replacement - s/n, aftermarket genuine, etc, but other than ensuring that the fittings are the same (there is the option of jubilee clips or 'the other ones' whose name I don't recall) are there any guidelines for a rad swap?

And of course - coolant. I'll obviously be needing some. Is it essential to use genuine VAG? I've been using Comma XStream Green Extralife without problem, although the coolant in the Audi was put in by a very nice forum member in N. London when he changed my cambelt and associated parts.

TIA.

(Once that's done I'll have a look at the clutch release bearing... )