Hi James
i did it a year ago for trucks, fairly easy if your working as a mechanic,
some terminology is different but they will explain if you ask
i browsed through a few things online to help if asked, like auto box basics but also haven’t worked on them in my career and said that,
and a few how things work on YouTube but mainly because I was panicking
they are really not trying to catch you out only prove you are in the trade and have a idea,
there was a few questions on traction control which i didn’t expect and on thinking about on way home I realised I’d given a wrong answer,
As other people have said no need to panick,
do revise so your confidence is up especially on the things you feel weak on but on basics and there was nothing really complicated in mine,
lasted a hour but I answered a lot quick as simple
Regards
Gary