Funnily enough, your near neighbour (me) also has a similar cooling issue. I can run it on idle all day and it stays at 90. And out on the open road it sits at 90. But then, if I slow down in traffic or climb a steep hill, the temperature rises. Or if I then sit back at idle it also rises. And it started to happen after a belt change (with a new thermostat). It was very unnerving initially, but eventually I let the temp rise - it goes up to around 100 and eventually it falls again. It’s been like that for a couple of years an, inititially I was doing a 75 mile daily commute.
Not sure if anything would show up on VagCom, but if you fancy a careful drive to Redmile, I’ll plug it in for you (I’m up to my ears in decorating, so can’t come to you just now).
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2002 Final Edition S8. Ebony black with Silver Grey leather and myrtle wood trim. Current mods: solar sun roof, 20mm rear spacers, 15 mm on front, red brembo callipers, 6k headlights, rear view camera, engine remap, alloy dash dial rings, alloy navi rings, tt/phaeton pedal upgrade, (and custom matching foot rest) dension ipod interface & parrot hands free kit (both fully hidden), av input, tv in motion switched thro' PF switch in blanking plug right of steering column, Audi 'quattro' sill covers, repositioned centre console switches, radio clock, .
Planned mods: auto-dimming rear view mirror, dash cam (as steamship's), fit the ski hatch, refit philips drl's (or maybe not - nope, definitely not - horrible botch!).
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