Pic. 9.9. To start a car with a dead battery using an auxiliary battery, it is not necessary to connect the starter wire to the auxiliary battery terminals - this is much easier to do in the Mercedes E-Class engine compartment
Sequence of work
1. Place the car from which the engine will be started in such a way that the battery contacts of both cars can be connected by wires.
2. Turn off all electrical consumers in the vehicle.
3. Connect the positive terminals of the batteries, first securing the wire terminal to the discharged battery, then to the charged one.
4. First connect the second wire to the negative terminal of the car with a charged battery, and then to the negative terminal of the discharged battery.
5. Start the engine on the car with a charged battery and let it run at high speed so that the alternator provides sufficient voltage.
6. Start your car engine. If the engine does not start immediately, pause between attempts to allow the starter to cool. The engine of the first car must continue to run: the discharged battery will be recharged.
7. Remove the wires in the following order: first from the negative terminal of the battery - «donor», then from his. Remove the wire from the positive terminals: first from a car with a charged battery, then from a discharged one.
8. After starting the engine, let it run at high speed for a while so that the alternator can recharge the battery.
Starting the engine by towing a car
This method is not suitable for a vehicle with a faulty ignition system. Work with an experienced assistant. Remember that when the engine is not running, the brake booster does not work.
1. Switch on the ignition and 2nd gear and depress the clutch pedal.
2. The towing vehicle must move slowly.
3. At a speed of about 15 km/h, slowly release the clutch pedal. Get ready to slow down (right foot over the brake pedal).
4. If the engine starts, press the clutch pedal and then the accelerator pedal.
5. Horn the driver of the towing vehicle and bring both vehicles to a gradual stop.
Push start engine
This method is preferred if the engine and starter are in good condition. Pushing should be avoided if the engine does not start due to a malfunction in the ignition system: unburned fuel mixture residues can ignite and damage the catalytic converter.
1. Turn on the ignition and 1st gear. In higher gears, the alternator will not rotate fast enough to provide high voltage.
2. Depress the clutch pedal, start pushing the car until it rolls.
3. Quickly release the clutch pedal - the engine crankshaft will turn, the engine should start. If it starts to work, quickly press the clutch pedal and then the accelerator pedal.