What functions should be turned on when driving in heavy rain?

[Ruby]

When encountering heavy rain, functions such as auto start-stop and auto hold should be turned off. Here are some tips for driving in heavy rain: 1. Proper use of lights: Whether it's day or night, always turn on the low beam and position lights when driving in rain or fog. If the rain is too heavy or visibility is poor due to thick fog, turn on the fog lights. Hazard lights should only be used when parking or during emergency braking to alert vehicles behind. They should not be turned on randomly during normal driving, as this can make it difficult for vehicles behind with poor visibility to discern the lane-changing intentions of the vehicle ahead or to spot vehicles stopped on the road due to various reasons in bad weather. 2. Low speed and high RPM when passing through waterlogged areas: If you need to pass through a waterlogged area, drive in a low gear at a slow speed, maintaining steady throttle. Avoid stopping, shifting gears, or making sharp turns midway. Even if you use neutral gear, keep revving the engine to ensure the exhaust pressure is higher than the water pressure, preventing water from flowing back into the exhaust pipe and damaging the exhaust system. If the water depth exceeds the center of the wheel or the exhaust pipe, it's best not to proceed to avoid engine stalling during passage.