You are right about the comfort access it only works on the front doors however you don't have to physically open the front door just put your hand between the door and the handle to activate the unlock.
Cannot help with the other two queries as I know nothing about coding however on mine if i hold the lock button on the fob the wing mirrors fold in (not sure if this is an option though!)
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Now - LC1 20d Carbon Black
Gone - F25 20d Space Grey
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