Blind spot assistance

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on the JC’S annual würstewanderweg trip through the glorious sausage fields of the Ostallgäu, he had occasion to be driving a rental Mercedes Benz — I know, look at you, right? — with a clever feature which symbolises what software should be about, but reg tech typically isn't.

In the corner of his rear-vision mirror, a little red triangle, artfully engineered into the mirror, which would light up each time one of those enormous series seven beamers come roarng by at 200 klicks on the outside lane of the autobahn.

If you should indicate left while the light is illuminated, it would squeak — calmly, not stridently, but with enough implied menace to convey the message that going ahead with that manoeuvre would be faintly suicidal — allowing you a chance to let said monster BMW to sedately soar past.