Speaking of keeping moving with a mechanical failure, one morning I broke a
Kugelfischer fuel injection pump belt on a '72 BMW 2002tii on the way to
work.  Faced with being stranded in rush hour traffic with a totally
inoperable engine, I wired the windshield washer pump wires to the cold
start valve (an electric fuel spray valve in the intake plenum) and supplied
pulses of gas to the engine by activating the washer pump switch.  I can't
say that it ran smoothly or that shifting gears was easy (the washer switch
was on the turn signal stalk on the RIGHT side of the steering column) but I
made it back home and drove my other car to work, making it there only about
30 minutes later than normal.

I don't have this BMW now but I kept it until a few years after I bought my
Vanagon in '91 (required Vanagon content).