I agree entirely with the comments, but as a hand-disabled driver I would go much further than the suggestions being made.
My left hand is pretty useless and I am thinking that one day soon there won't be a car available without one of those dirty great tablet things stuck atop the dashboard for operating all controls such as heating/ventilation and 'infotainment' (God I hate that word). This wouldn't just affect disabled drivers, able-bodied drivers would also be distracted from actually controlling the vehicle properly if they try to operate these daft touch screens. Are they any less safe than using a mobile phone? No, because your attention is elsewhere whenever you use the thing.
Car controls should be as simple as it is possible to make them. As I have said before, I drive a Yeti, chosen because of its reasonably low tech dash. However, the heater control is just crazy. Switch on the fan and it immediately goes to the highest setting. The driver then has to tap a tiny button to reduce the fan to a lower setting. Dangerously distracting, I would suggest.
I would advocate that controls go back to basics... A slider control for heater, push pads for selecting heater fan settings - push to switch on, push again to switch off. And these controls should be large enough that they can be actuated by a clenched fist. It would mean no unnecessary distractions.
Yes, I know I am being selfish, but actually every driver would benefit from such simple controls.
Designers should be made to imagine they are wearing mittens when they are planning control layouts. That would solve the problem.
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