AHA! I KNEW it!
A year or two ago I came across a w116 miniature outfitted as a police cruiser, and querried whether the w116 had ever done police service.
By American police cruiser standards, the w116s would be a nice fit: sturdy V8, reliable and durable, a good handler, large 4 door to handle two officers and the hoodlums in the back seat, etc. But no one at the time had any positive evidence to offer, and some thought that the w116 was just too big to handle narrow Euro roads.
Good find, 116Benz!