Yes, you will need to move that sensor to the new car (I think.)

Bleeding the brakes should have no effect on the clutch system. It must be bled separately. If there was air in the line joining the clutch master to the brake fluid reservoir, the clutch will need to be bled.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13