What paperwork? When I took my MX to service, I signed 0 paper. They took my key, told me to wait for a minute in the lobby. A guy showed up and said "I will take you to your loaner." Walked me to a MS parked there, point to it and gave me the key. All he asked was if I left my UMC at home or with the MX.. I said at home.. then he said " you are good to go.. feel free to supercharge it anytime if you want." Seriously it felt pretty strange. It's like a friend let me borrow his car. When I get a loaner from Lexus.. I have to sign a bunch of paper.. they made copy of my DL and Insurance. Promised not drive it out of state or over 100 miles a day.