Hi we have a tt 2001 model 225bhp. It recently started to go bit funny on the temp needle. When we are stuck in treffic it goes above the 90 mark and soon as you drive again it goes back to 90!
We have had the thernostat replaced and had it on the diagnostics but no problem comes up. Also my mechanic had it turned on for 20 mins but the needle stayed dead on 90!! this is really baffling me. My mechanic also took it for a test drive to see if it happens but it was behaving ok at that time.
Can anyone shed any light on this? Could it be the fan sensor etc?