By Mb agreeing to your application any extras opted for will be covered as they own the car.. With the agreement Mb has with rsa not us the actual leaser.
If you damage the interior it will not be covered or ones own possessions left in the car are not covered either. any addons after signing the pin that not authorised by MB and recoreded with rsa will not be covered..
it’s a 3 party agreement not just between us and rsa or mb and we not privy to all the agreement MB has with rsa.. thats my understanding of the contract and the law..