Back in the day if you had a 1960 - 1970 car you would change the points, cap, rotor, and spark pugs twice a year. First before the winter (as in Wisconsin or Minnesota) were it gets really cold, and then in the spring. Of course you were driving the car every day. I have been recently searching for some spare points, rotor and cap for my M130 W108 and was at the dealer this last Thursday and got a quote of (with MBCA discount):
Cap $57.20
Rotor $27.20
Points $17.00
A far fetch from my order back in April of 1985 as seen on the attached image
Regards,
280SE Guy