I have ordered a 90d, and would like to put a tow bar on it. For occasional light towing, but also for bike racks instead of roof mounting. Has anyone in the uk done this, and if so who did it for you / what make of towbar did you fit? Also - a trailer or bikes will trigger the sonar sensors on the rear bumper. Does this mean autopilot can't be used when towing or carrying bikes? Thanks.