From two holes in the rear centre of the engine undershield two puddles of liquid, plus slow loss of coolant. Will remove undershield this week-end to investigate which looks easy enough, a mixture of bolts and Torz screws. With a back problem this may well be a problem particularly if undershield is heavy. Gut feeling it will be more than a loose hose clip - the word water-pump comes to mind and thus a trip to my village garage ( not convinced need to waste money at Audi dealer, or should I? ). From this mechanical thicko to those of you brighter and more able to comprehend such things am I on the right track?