I have the same
problem now 1.8T AUQ Leon but I imagine it is all the same. I can tighten the bolts but within a couple of days the
problem is back.
I will try and get the bolts, some nordlocks and a gasket but my
problem is the third bolt at the back which is a PITA to get to because of the raised "fins". I can get a spanner over it at an angle until it is practically on the washer. I was thinking of putting an extra washer or two in so that I can properly tighten it down. Anyone think this is a viable option ?