Welcome to M/A! As a Generation 1 owner of 3 MINIs, I cannot be of the slightest help to you, but I am positive that others on here [when they come "on"] will be able to offer suggestions to help solve your problems.
Good luck!
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	wmwny Well-Known Member
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Welcome to MA!
Try here. Its for looking up parts but it may show you how the trim comes apart.
https://www.realoem.com- 
				
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I wasn't much help. I will look in the Bentley manual today and see if it has anything. I could see is I could get them apart on my wife's R57 but that would be bad for my health
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	Dave.0 Helix & RMW PoweredLifetime Supporter