Some developments!
I removed the engine cover to see if anything obvious had come off and noticed the connector on the turbo was loose. When I first had the car in with Audi for a once over they said the connector on the turbo side was broken.
Today it was loose and there appeared to be a bit of melted plastic round the clips. I cleared the plastic away and cable tied the connector on. Started the car and the glow plug light had gone off. Took it for a spin and limp mode had gone and the turbo was working. Engine light remained but perhaps it's because a fault was logged?
I had a good look at the turbo and from what I can see the half with the electrical connection appears to seperate from the rest of the unit. It has a different part number too.
Is it possible to replace just the electrical bit? I'd rather get this sorted and not have a temporary fix with cable ties!
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