Safety rules when working with the ignition system (Mercedes-Benz S-Class W116)

Work on the transistor ignition system must be carried out at a service station so that sensitive and at the same time expensive parts are not damaged, short-circuited or otherwise disabled. The ignition system generates high voltage, which is dangerous to life, as indicated by the corresponding warning stickers, and which we must remind you of once again. Based on this, it is necessary to familiarize yourself with the following safety rules before starting work on the ignition system.

Persons with heart disease are not allowed to work.

Do not remove the ignition system wires when the engine is running. This also applies to turning the engine with the starter.

Work on the ignition system, such as disconnecting or connecting wires, may only be carried out with the engine and ignition off.

Connecting and disconnecting measuring instruments is only carried out with the engine and ignition off.

When checking the compression in the cylinders, turn off the ignition and disconnect the control device plug (green wire). The same safety rules apply to adjusting the valves; the engine shaft can only be turned manually.

To check the ignition timing, use only a flash lamp of a compatible design.

To avoid damage to the ignition system, the following safety rules must be observed:

Do not connect a noise suppression capacitor to terminal "1" of the ignition coil.

Terminals "1" and "15" of the ignition coil must not be shorted to ground, as prescribed in a number of instructions for installing anti-theft devices.



Use only original parts in the ignition system.

Do not test the ignition system with the engine running. To test the ignition system for radio interference, do not remove the central wire of the ignition distributor and check for a spark by bringing it close to ground. Do not remove the wires from the spark plugs with the engine running.