Just need some advice from you chaps!
I was supposed to pick up my GTI this lunch. I am really looking forward to this as I waited more than four months for the car. Unfortunately I cannot accept the car as one of the option I specified on the order form was missing

---the luxury pack. I need the folding mirrors as my garage is just 2010cm wide!
Spoke to the sales manager and he rung up VW tech and was told the mirror cannot be retrofitted. The salesperson then called me later said one of the tech guy had done one on a Scirroco. They will transfer the folding mirror from one of the demonstrater to mine! They are also happy to discuss compensation!

I am happy that they are trying their best to help me to deliver the car I wanted. But I am a bit worried that they are trying something that is not recommended by Vw UK.
Really appreciate some help and advice here!
What should I look out for to make sure they fitted it properly?