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HI Gareth, if the live data shows the injectors are running rich that means the engine temp will be cooler due to bad combustion, lean combustion will cause rapid warming internally therefore commanding the pump thermostat remain fully open despite the low ambient temp, I think the original posters problem was the oil fired auxiliary heater which was always a problem on cars sold in Scandinavia. Steve.

In terms of driveability the s tronic is the most refined. The other two types of Audi auto gearboxes would be tiptronic or CVT, tis is more generalised. Service history is key on any car you're looking at and you should be looking for prof of gearbox oil services. If you're worried then you're better sticking with the 6 speed manual

Update. So no compression, zero across all 4 cylinders. Quick bore scope, cylinders look ok but limited view obviously. Some carbon on inlet valves but they don’t think excessive or to a level they think it would cause zero compression. Fault code showing for low fuel pressure now. The garage it’s at are going to retime the engine and if it’s still the same then they would condemn at that point and recommend uneconomical repair on the engine.