ADJUSTING INSTRUMENT, EXTERIOR MIRROR UNIT, MOTOR VEHICLE

Adjusting instrument for an exterior mirror of a motor vehicle, comprising a foot for attachment to a fixed element of the motor vehicle, and a housing adjustably connected with the foot, the housing being adjustable around a rotation axis extending through the adjusting instrument, while around the rotation axis a passage opening is provided for passing through a cable tree, the housing being provided with a slot along a height thereof which provides lateral access to the passage opening and the foot being provided with a slot along a height thereof which provides lateral access to the passage opening, the housing being furthermore adjustable relative to the foot into an assembly position in which the slot of the foot aligns with the slot of the housing to provide lateral access to the passage opening for laterally introducing a cable tree into the passage opening.