If those 2 tabs don't fully retract it's obviously a pain to get out!
I have just replaced the lockset on a gti6, door locks done in about 30 seconds each but having a nightmare with the ignition barrel, I have got the old one out with a bit of brute force as I wasn't worried about damaging it, the new one is in but as I had to gently tap it in to position I think I may have damaged it and the key is very notchy and sticks on a little, The operation before I put it on was perfect so think I may have damaged it on fitting!
Any suggestions on how to get the tabs to fully retract to make removal of the 'new' one easier so I can have a proper look at it!