66 20 510 Removing and installing/replacing control unit (Park Distance Control)
Saloon/Sedan, Coupe
Detach left trunk wheel arch trim in rear area. Refer to 51 47 161 REMOVING AND INSTALLING/REPLACING RIGHT TRUNK WHEEL ARCH TRIM .
Disconnect plug connections(1).
Scheme 1
Slacken screws (2).
Feed holder for control unit (4) in direction of arrow out of elongated holes (3) and remove.
Replacement only
Unscrew nuts (1).
Scheme 2
Remove control unit (2) from control unit holder (3).
Convertible
Remove lower section of side trim at rear right.
Release screws (1) and remove control unit holder (2).
Scheme 3
Disconnect plug connections (4).
Scheme 4
Replacement only
Unscrew nut (1).
Pull control unit (2) in direction of arrow out of guide (3) and remove.
Installation
Pay attention to cable guide.
touring
Slacken panel for trunk floor plate at front.
Note. For purposes of clarity: Illustration shows trunk floor removed.
Loosen nut (1). Unscrew nut (2).
Scheme 5
Unfasten plug connection.
Raise control unit and remove.
compact
Remove side panel cover.
Disconnect plug connections (1).
Scheme 6
Unscrew nuts (2).
Lift out control unit (3).
66 20 545 Removing and installing/replacing a rear ultrasonic transducer (Park Distance Control)
Remove complete rear bumper. Refer to 51 12 000 REMOVING AND INSTALLING COMPLETE REAR BUMPER (M3) or 51 12 003 REMOVING AND INSTALLING COMPLETE REAR BUMPER (M3, M3 CSL / LIGHTWEIGHT DESIGN) .
Expand detent lugs (1) and pull out ultrasonic transducer (2) in direction of arrow.
Scheme 7
Installation
Detent lugs (1) on ultrasonic transducer (2) must not be damaged.
