It's very important to know where your air intake is for your engine. Some new cars are what I call bottom feeders. Their air intake is routed below the bottom of engine compartment.

Diesel W123 (49 state) vehicles have a fairly high air intake at the top of the radiator cross member. The likelihood of water stalling a W123 diesel engine is low as long as the water you ford is below the middle of the radiator and as long as you go slowly so you don't create a huge bow wave that will wash over your hood (and into your air intake). If you do get water into your air intake, water will be sucked into your engine and you will quickly hydro lock and break your engine.

Of course anywhere there is an air vent for a component such as a transmission (yes there is one there) or differential or wheel bearings that get soaked you need to refresh (change) the lubricant / grease as soon as you can as it will probably be contaminated.

__________________
Pete Williams, President emeritus - MBCA-International Stars (Eastern Mich.) Now Wi. & Az.
1985 300D Manual 4 speed Green Hen's tooth
1979 MGB triple black Az car nice
1969 back 1/2 of MGB (Az home built trailer)
1991 Volvo 245 Wagon Nice AZ Restored Gold Brick
1983 Jeep CJ7 37,600 Miles Summer use only