Audi A1 Engine Light On and Juddering

I am a bit useless with cars, sorry. I am hoping someone can help give some advice about my partner's A1 problems.

She has an Audi A1 Sportback TFSI S Line (2013, automatic), and it has been having problems for the past few months.

It started off with the engine light coming on, but the car was driving fine. The mechanic said a pipe, or something had come loose, and it was fine for a while.

Then the engine light came on, and the car started juddering a lot, so my partner called out AA.

Since then, the car has been back to the mechanics with this problem 4 times now. We used a different mechanic the 4^th time as she is getting very stressed by it.

So far, I think they have replaced spark plugs and ignition coils. The car has been fine for around 2 weeks since the last mechanic checked it, but it started again last night.

She is on about trading it in and getting a new one, but finances are not great at the moment, and there is a good chance I’ll need a new car too soon.

Any advice will be greatly appreciated!