We have the Buccaneer with self levelling. On a slope don't try and use the auto levelling.
Use the manual mode to lower front steadies first to see the travel of the steady along the front foot pad. It should not go forward by more than 3/4 along the foot pad.
To lift the steadies use the lift symbol, but then switch off the unit when \the front steadies have lifted enough to slide a block under. Switch on and manually lower front steadies onto block. If you let the steadies rise all the way and then lower them again doing this 2 or 3 times may flatten the battery.
Find big enough block to place under the front steadies so that the front lifts to more or less level. We use
these which are light weight. However it is always best to park up with a slight slope for rainwater to run off the roof.
We park up on a slight slope, but in our case the slope is towards the rear end. We do not use blocks and find the steadies are fine. Under no circumstances leave the handbrake engaged. The two wheel locks will hold the caravan in position anyway as the wheels cannot turn.