This is my 2nd attempt at servicing the pollen / cabin air filter on a UK
Cupra Formentor.
Never have I had such trouble in all my cars, it gets worse every generation. I even purchased a quality stubby Torx 20 so I could get in without any witness marks but I'm stuck with the trim now.
Step 1. Remove engine
It may be possible to extract the air filter while bending the glovebox out of the way. But there is barely enough space to squeeze 1 hand in there - the filter would need to be bent through the tight space - which is why I would prefer to get the glovebox out of the way.
However from looking at salvage parts I believe there is another clip holding the glovebox on which is underneath the side trim (behind the airbag deactivation switch).
The side trim sits underneath the door seal, which means prizing the rubber seal off partially, then prizing off the side trim, somehow without breaking anything.
I deemed risk of damage too high, so I aborted. I don't have good trim tools to proceed safely.
Posting here anyway as I have no plans to progress. But so far, the uprated filter I want to fit and tools I purchased are a waste of money. The filter in there should be 3 years old at this point. It's a shame what modern cars have become.