Sound changed, is closer to the red car in the first video now....might be identical with sound cover on... Looks like slight improvements in vibration department( also compared with the first video), sounds like my one now but i am not sure at vibrations.... Hard to tell. I obviously do not feel any vibrations inside the car to make think is something wrong but i can tell if engine is started or not; but i need to be on full stop and squeeze the steering and keep tight so i can feel anything.( My one is the 150hp so turbo and injectors are different as far as i checked).

 

How it behaves when driving it?

Thanks for the independent view SpAwN. 

 

It does seem improved, but there is also something not right. It still stalls more than I feel is user error and feels sluggish from low revs. Tonight it behaved pretty well until the start/stop system operated, then it juddered the rest of the way home. 

 

However I now feel the second garage are fed up with it. I might avoid using start/stop for a bit and see if that's the issue. 

 

I'll let you know if I send it back again. 

I wonder if the actual issue would be flywheel related in terms of vibration felt inside the car, as for stalling... I would doubt at 400Nm torque as should pull like a train...tho that is valid from 1800rpm...

 

Just to compare ( exclude human error ) might worth booking a test drive on a similar car somewhere, even finding a used one somewhere...

You're not the first to mention flywheel. The other mention is transmounts but I believe both are big engine removal jobs it will be very hard to get started under warranty. The whole issue is about subjective quality of driving, if something actually fails and has to be fixed to drive the car I will be in a better position! 

 

Marshalls Reading were awesome and let me test drive a newer 2k miles Superb estate L+K 190 TDI (it was the donor car for swapping the injectors, Skoda made the workshop try it before they authorised the parts). It was quite different, smooth and torquey from low revs, whereas mine tends to judder from low (and stall) but is fine once on the boost. Unfortunately the battery on the donor car was not charged enough for me to try start/stop because that's when the judder is really annoying and noticeable, I would expect hardly to be able to notice. Apparently the engine is also slightly different despite identical injectors and power figures. I investigated a swap but unfortunately it seems I am not at a good break point in my finance agreement. 

 

I'm now looking at specialist garages just to get a proper opinion unbounded by the cautious and glacially slow warranty process. 

I doubt very much is engine/transmission mounts, would not make it stahl... And i am pretty much going on the assumption they checked electronics, sensors data etc... Obviously i am not in your shoes but seems odd they cannot figure it out or they do not want to...