did you mean 4" or 24" ? for the recent 4x4 models it's officially 24" https://sprinter-source.com/forum/showpost.php?p=566746&postcount=14Sprinters were not designed for water deeper than 4" The electrical system is too finicky to be submerged because of a CANBUS system and non-waterproofing. Every Sprinter that has been submerged over hubs in the USA has to be given a flooded/salvage title
Same reason I fitted mine.TI was more thinking about raising the intake higher up to avoid most dust from vehicles driving in front of me on gravel roads.