Please see the text below that I just read from the latest manual version 7.1. I launch/retrieve my 1200 lb sailboat/trailer from a boat ramp. The procedure described below on page 68 and 69 would make that so cumbersome as to be impossible. For those of you that do not ramp launch/retrieve trailers let me describe the procedure in a conventional car. Retrieving requires more time on the ramp so I will describe that. Back into the water to submurge the trailer to the correct depth. Usually this is done with 2 people but can be done with one. Then set the emergency brake and for safety I also shut the car off and put in first gear for a stick shift or shut off and put in park for an automatic. That way you have 2 redundant systems keeping your car from becoming a boat. Then exit the car to assist the other person in the retrieval. I do this procedure 2 and sometimes more per week and there is usually a line so you cannot tie up the ramp too long. This procedure "requires" a person to set chocks under the wheels of the car and also under the wheels of the trailer that are now submerged! Both of these requests are unreasonable. The rear car wheels are usually at the water line or submerged a few inches. Even trying to use this procedure would require more than one person since someone needs to set the chocks under the front wheels while the driver is behind the wheel. Again, not acceptable. My question for anyone that has tried this with a Model X. Is it possible to engage both the "hill hold" brake and the parking brake simultaneously. If so that should securely hold it on the ramp even thought that would not comply with the page 68/69 description. Launching and retrieving a boat for me is absolute necessity. It it the reason I have waited for the X instead of buying an S. Ron From Page 68 and 69 Parking with a Trailer Whenever possible, avoid parking on a grade. However, if parking on a grade is absolutely necessary, place wheel chocks under the trailer’s wheels: • Press and hold the brake pedal. • Have a second person place the wheel chocks under the wheels on the downgrade side of the tires. • When the chocks are in place, release the brake pedal, making sure the chocks are holding the weight of the vehicle and trailer. • Make sure Model X is in Park (which engages the parking brake). Note: When the chocks are in place and you release the brake pedal, ensure that Vehicle Hold (see Vehicle Hold on page 58) is not braking Model X, preventing you from checking that the chocks are holding the weight of Model X and the trailer. If Vehicle Hold is braking Model X, the Vehicle Hold indicator light displays on the instrument panel. To disengage Vehicle Hold, press and release the brake pedal. Warning: If parking on a grade is necessary, always ensure that all trailer wheels have been securely chocked. Failure to do so cause result in serious damage, injury, or death.