Ahhh, I need help!

This afternoon I was cruising in my 1980 450SL and I came up on a hidden dip in the road...the front end bottomed out pretty hard and then my brakes suddenly stopped working.

When I hit the brakes, it doesn't go all the way to the floor, and I have to press down REALLY hard to make it stop at all.

I took a look under the car and nothing is hanging or seems to be broken loose, and nothing is dripping or leaking.

Does anyone have any thoughts on what the problem may be, or what to look for to test?

Thanks!