I have not read manual yet, but yesterday after trip and placed mine P500 into 4W and L gear , and thought it would lock and not move when the engine is off. I always engage manual brake when haul and put it on 4W in Low gear and I was confident that it locks all 4 wheels and should not move. BUT it does, unless you put in Reverse in 4W then it locks all 4 I assume and I can not move it and then I add manual brake.
But all my previous trips I realized I was locked basically with manual brake.
But all my previous trips I realized I was locked basically with manual brake.