Mercedes S-class W202

1993-2000 of release

Repair and car operation

Mercedes W202
+ 1.2. The general data
+ 2. Maintenance service
+ 3. Engines
+ 4. Greasing system
+ 5. Cooling system
+ 6. Heating, ventilation
- 7. Ignition system
   7.2. Safety precautions at repair of electronic system of ignition
   7.3. Ignition coils
   + 7.4. Spark plugs
   - 7.5. The device of a preliminary warming up of a diesel engine
      - 7.5.1. Check of the device of a preliminary warming up A lamp накаливания An anchor Candles накаливания The temperature gauge of a cooling liquid A temperature-sensitive element of soaked up air
      7.5.2. Device self-diagnostics
+ 8. Fuel system
+ 9. Transmission
+ 10. A running gear
+ 11. A steering
+ 12. Brake system
+ 13. A body
+ 14. An electric equipment
+ 14.2. Electroschemes Candles накаливания

To check up current consumption by separate candles накаливания, in a repair truck apply the direct current ampermeter. Current-measuring pincers are clamped over the corresponding isolated wire, and the current size is measured by an induction.


1. Current-measuring pincers if are available, clamp over the separate wires going to candles накаливания, establish ignition on a warming up (the engine cold) and measure current consumption. Placing of wires: the cylinder 1 = black-dark blue; the cylinder 2 = black-violet; the cylinder 3 = black-red; the cylinder 4 = black-yellow; the cylinder 5 = black-green.
2. The engine in volume of 2,0 l: after approximately 8 seconds consumption of a current by each candle накаливания should make nearby 14–16 And.
3. The engine in volume of 2,2/2,5 l: after approximately 10–20 seconds consumption of a current by each candle накаливания is short-term should make nearby 8–15 And.
4. If the measured value exceeds the top preset value, replace a corresponding candle накаливания.
5. If the measured value below the bottom preset value of a candle накаливания check up on breakage a current carrying line.
6. If there are no current-measuring pincers, establish ignition on a warming up (the engine cold) and connect a control bulb between the candle plug накаливания and the block of cylinders of the engine. The control bulb should flash, otherwise check up on breakage токоподводящий a wire to a candle накаливания and, accordingly, replace it.
7. Switch off ignition.
8. Check up candles накаливания on electric current passage. For this purpose remove штеккер for candles G1–G4 (G5) on the relay of management of a warming up.
9. Measure by an ohmmeter one after another resistance between counters on штеккере and the case (the block of cylinders of the engine). If resistance aspires to infinity (оо), breakage in a candle накаливания or in токоподводящей lines.
The prevention

In the relay of management the warming up builds in electronic protection against short circuit. At short circuit in candles накаливания or electric wires the current chain is broken off. The relay again can function in that case when short circuit is eliminated or if the ignition key will turn back in position "0".



1. Remove an inlet gas pipeline.
2. Unscrew a nut for an electric line.

The prevention

At some models the nut is inserted as the integral accessory into a cable tip of a line.

3. Unscrew a candle накаливания flexible face key SW 12.



1. Remove штеккер (marksman) with a candle накаливания.
2. Unscrew a candle накаливания (R9) face key SW 12.

Candles накаливания with the burnt through pins

The burnt through pins of candles накаливания frequently are a consequence of malfunctions of atomizers which are not caused by lacks in or on candles накаливания.

If such candles накаливания it is not enough of them to replace are found out. It is necessary to make also check of atomizers on formation of a stream of injected fuel, vibration, pressure and tightness (work for a repair truck).


1. Twist candles накаливания with the moment 20 Н.м.
2. Screw an electric line together with a nut with the moment 4 Н.м., Hence, manually, accordingly, with the tip.
3. The engine in volume of 2,0 l: remove an inlet gas pipeline.
4. The engine in volume of 2,2/2,5 l: remove a cross-section pipe of the air filter.