I have 1980 300TD and have been redoing my front brakes little by little. On my right front side, I replaced the rotors, loaded calipers and replaced the brake hose (that was the original problem and just did the rest). Now everything is new and I hear a squeaking coming from that wheel. Any idea on what would be squeeking and why? The old rusted out brakes and rotor that barely worked (locked up when it did) never squeaked a bit. The car does it just rolling at idle. Not when just the brakes are a pressed.

__________________
2022 Nissan Frontier Pro4x
1990 Mercedes 420SEL
1950 Packard 8

Previous German cars-
2001 Mercedes SL500
1983 Mercedes 300SD
2011 BMW 328i (manual)
2008 BMW 535xi (manual)
2006 BMW M3 (manual)
1980 Mercedes 300TD
2006 BMW 750i
1996 Mercedes E300D
1994 BMW 740i
2006 BMW 330xi (manual)
1999 E300DT Smoke silver/black 253k
2012 BMW 535i Xdrive M-Sport
1984 300TD-T 304k
1988 Mercedes 560SEL (parts car)
2010 BMW 550i xdrive
2017 Audi A4 Presitge
1979 300SD 313k
2003 E500 189k