More details on the model as not all are the same but if you haven't got at least 3.4m clearance you possibly won't be able to lift the roof inside. Best way to work out height is to stand on a ladder with a long straight edge across the highest roof point, use a spirit level to get it level then the extra hand can measure to ground that will give you height, always add 50mm to allow for Murphy. If you have any sort of slope on entrance you must allow extra height as the end going thru the doorway will be higher until the wheels hit the floor........................................but we do need the model, touring or outback and if any suspension/tyre changes best really to measure the actual vehicle.................