The disclosure relates to an adjustment device for adjusting an orientation of an external vision element of a vehicle about a first pivot axis and a second pivot axis. The adjustment device comprises a base for coupling to a vehicle; a frame pivotably coupled to the base about a first pivot axis and a second pivot axis; and a drive unit for driving the frame pivotally about the first pivot axis and the second pivot axis. The drive unit comprises a first electromotor connected to a first driven element for driving the frame in rotation about the first pivot axis, and a second electromotor connected to a second driven element for driving the frame in rotation about the second pivot axis. The second electromotor has a lower maximum power consumption compared to a maximum power consumption of the first electromotor.