REFERENCE AT A GLANCE CONTROLS DRIVING TIPS MOBILITY 85The risk of hydroplaning increases with declining tread depth on the tires, refer also to Tread depth on page100.Driving through waterDrive through water on the road only if it is not deeper than 1 ft/30 cm, and then only at walking speed at the most. Otherwise, the vehicle's engine, the electrical systems and the transmission may be damaged. <Parking brake on inclinesOn inclines, do not hold the vehicle with the clutch; use the parking brake. Other-wis...