I tried to get mine "off" once and couldn't. Have not tried again, figured I would have to read the dang manual. It should not have been that hard. My R1200RT wasn't hard, but slept a few time since then. Haven't tried it since. I was going to do just as you were - try it at the H position. Will be interested in your experience with the RDL on this Grand. My Grand does have the low seat partnumber on it.