Rumble When Braking 1990 300ce?

[AdonisReed]

So braking from highway speeds to about 45mph car rumbles under braking, appears to be coming from the front. New rotors, pads, and rebuilt all 4 calipers 2 years ago, last year new front lower control arms. No shudder or rumble at lower speeds that would indicate warped rotor. From high speed the harder I brake the louder the rumble.https://19216801.onl/ https://routerlogin.uno/ https://192168ll.link/
Suspecting front wheel bearings? All quiet coasting, or going around corners.
Thoughts?

[Usaguy]

wheel bearing play should be between 0.01-0.02mm (half to one thou. the needle barely moves) sometimes they need adjustment but if it's only slightly out of spec it shouldn't cause a rumble

put a dial indicator on the rotors and check them. Can't have more than 0.12mm (5 thousands of an inch) of runout. If you have more than that then check the hub with a similar method to check if it's not bent or something

Can also be worn suspension