After having set the valve clearances some weeks ago, I continued the little tune-up today with new breaker points. They had been delivered to my Mercedes-Benz agent who was surprised to see such an item again after a very long time. Then I visited the local BOSCH agency and obtained some special super-sticky grease for the distributor shaft.
At the car, the distributor cap and rotor were easily off, the distributor shaft cleaned and the new breaker points installed, with the gap pre-set to 0.4 mm when open with the help of a feeler gauge. The most difficult thing was to turn the distributor shaft for the contacts to be open. The car being automatic, there was no use in pushing it to and fro. The remedy was to simple slacken the distributor fastener and turning the whole distributor around its shaft. The ignition timing has to be re-set anyway. After everything was put togeher again, I fine-tuned the dwell angle by carefully moving the breaker points in the distributor and finally obtained the perfect 41-42 degrees.
After every little part of the tune-up, the engine runs smoother and the revs when the engine is idling are rising and rising. Obviously the car enjoys the care that is being taken.
