Well you can't change your train so the bottom screen would lead you up the garden path and kill your unit if you did any of the 3*, 4* or 5* updates. Those updates are suppose to be only done in a Seat dealership so they don't do stupid things. People reading websites sites do if they don't read everything. If it started to read in a train jump update, your boot area gets deleted. It's an open the unit up and short pins out.
Basically how mib2 standard works is they had a train for every year of it's existence. The updates were on the train like 2* in your case. I'm not familiar with mib2s without navigation. Whether you can use 253T I pass.
There is a mib2 firmware thread with people that may better answer your question.
well i got it working again contactable by vcds again phew :oops: seems if you start playing around with things in the variant info screen you can knock it out of whack. so this unit can be brand changed to seat if needed. seems if you want to change the part number to make it fully converted...
www.seatcupra.net
The main thing is you will kill a mib2 standard unit if you jump trains by using the wrong software. You can't jump to 516T just like that if you were on 253T seduced by all it had to offer. This is where
@East Yorkshire Retrofits has rescued people in the past that killed there units.
I suspect there might not be much you can do with that unit except replace it.