They would be doing us all a favor if they wrote to the people who buy their SUVs. The message, urgent as it is, is pretty simple.

“Please note that ALL of our vehicles, including SUVs, come with turn signals. To activate a turn signal, first locate the stick thingy on the left side of the steering column. Then simply reach forward with your left hand, that’s the one holding the phone – have no fear, the person you’re talking to won’t notice – and gently move the stick down to indicate your intention to go left and up to go right. You will a hear a clicking sound. This is normal and it will cease as soon as you complete the turn. Next month: signaling a lane change.”