I'm willing to bet that it's either a warped front rotor or a sticking caliper problem.
If your steering wheel shakes / vibrates and your brake pedal pulsates, it's almost certainly a rotor / caliper problem.
My engineer buddy at Mitsubishi Motors U.S.A. tells me that worn out tie rod ends will cause a front vibration problem that can cause your steering wheel to shake. It almost feels like you have a front tire that is slightly out of balance. With a worn out tie rod end, your wheels will actually bounce from side to side, instead of up and down as in the case of an out of balance tire.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".