An extendable exterior rearview mirror assembly includes a mirror
subassembly, a bracket which is adapted for mounting to a vehicle, and a
support which mounts the mirror subassembly to the bracket. Support
extends into the housing which is movable along the support. The housing
includes a retracted position and at lease one outboard position, which
define a direction of extension. The mirror assembly further includes a
drive assembly which is supported in the housing and drivingly coupled to
the support. The drive assembly selectively moves the housing along the
support. The mirror assembly further includes a clutch mechanism which
drivingly decouples the drive assembly from the support when a force of
sufficient magnitude is applied to the housing in the direction of
extension such that the housing can be manually moved along the support.
