Mercedes S-Class W-220

since 1998 of release

Repair and car operation

W220 Mercedes
+ Mercedes-Benz Cars of a class S (W220)
+ Operation manual
- Routine maintenance
   Active system of the prevention of term of approach planned THAT (ASSYST)
   Schedule of routine maintenance
   General information on control
   Check of levels of liquids, control of leaks
   Check of a condition of tires and pressure in them. Designation of tires and disks of wheels. Rotation and replacement of wheels
   Replacement of impellent oil and oil filter
   Check of brake system
   Check of fuel system
   Check of a condition and replacement of hoses of an impellent compartment, localization of leaks
   Check of a condition of ridge belts of a streaming drive of auxiliary units
   Check of functioning of system of cooling and frost resistance of cooling liquid. Liquid replacement
   Check of a condition of system of production of the fulfilled gases
   Check of level of oil of automatic transmission
   Visual check of tightness of automatic transmission
   Condition check suspension bracket and steering component
   Check of a condition of protective covers of power shafts
   Check of level of liquid of system of hydrostrengthening of a wheel
   Check of central air of air
   Greasing of limiters of doors and lock cylinder
   Visual control of a seat belt and safety cushion block
   Check of operability of headlights and horn
   Condition check, adjustment and replacement of brushes of screen wipers
   Check of a condition of the battery, care of it and charging
   Replacement of an element of the filter of air of salon / coal filter of purification of air
   Replacement of brake liquid
   Check and replacement of spark plugs. Check of a condition of high-voltage wires
+ Engine
+ cooling and heating Systems
+ Power supply system and release
+ engine Electric equipment
+ Automatic transmission
+ Power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ electric equipment Cхемы

Check and replacement of spark plugs. Check of a condition of high-voltage wires

Arrangement of coils of ignition, injectors and detonation sensors. Engine 113 (S420 and S500)

1 — the ignition No. 4 Coil
2 — the ignition No. 3 Coil
3 — the ignition No. 2 Coil
4 — the ignition No. 1 Coil
5 — Fuel injectors
6 — Д / the switch of level of oil
7 — the Sensor of a detonation 1 (the right side of the engine)

8 — the Sensor of a detonation 2 (the left side of the engine)
9 — the ignition No. 8 Coil
10 — the ignition No. 7 Coil
11 — the ignition No. 6 Coil
12 — the ignition No. 5 Coil

Dual coils of ignition for two spark plugs and and b of one cylinder

1 — the Case of coils and and b

2 — Designation on a cover of valves

Address also to the Spark plug Section.

Spark plugs, depending on type, are replaced each 96 000 km or 160 000 km.

 Attention! Spark plugs replace only on cold or slightly warm engine. If candles are turned out on the hot engine, the carving of a head of the cylinders executed from light metal can be damaged.


1. Before the beginning of work prepare all necessary tools. Some producers of spark plugs deliver special tools for measurement of a candle gap.

It will be necessary for work for you:

· Candle key of 16 mm, for example, HAZET 900AKF. HUNDRED DAIMLER-BENZ apply for this purpose a candle key 3122В.
· It is in addition recommended to get special pincers, for example, HAZET 1849 which facilitate an otvorachivaniye of candles. DAIMLER-BENZ applies for this purpose an assembly key 3277А.
· Depending on number of cylinders of the engine necessary quantity of spark plugs. Applied spark plugs are listed in Specifications. 2 spark plugs are applied to each cylinder.
2. The best way of replacement of spark plugs is preliminary purchase of new candles, adjustment of their gap and replacement of each candle in turn. Upon purchase of candles it is very important to choose those candles which are intended for the engine of your car. Information on them is provided in Specifications.
3. Having near at hand new candles, let's to the engine cool down completely before the beginning of removal of the old. During this time it is possible to examine new candles on existence in them of defects and to check candle gaps.
4. The candle gap is checked by insertion of a measuring instrument of the necessary thickness between electrodes on the candle end. The gap should correspond specified in Specifications. The delay should concern each of electrodes only. If the gap does not correspond to norm, slightly turn in the bent part of an electrode by means of a regulator with notches before achievement of necessary size of a gap.

At adjustment of a gap of a new candle turn in only the basis of an electrode of weight, without touching its end. If the electrode of weight is displaced rather central electrode, by means of a regulator with notches level them. Check a porcelain insulator on existence of the cracks indicating those, it is necessary to replace a candle.

5. Switch off ignition.
6. Remove plastic a casing closing candles, the coupled coils of ignition and high-voltage wires.
7. Replace candles. For prevention of damage of a carving during a wraparound of a candle use a rubber tube (internal diameter of 5/16 inches), put on its insulator. In attempt of a wraparound of a candle not on a carving the rubber tube will start to be turned on an insulator, without allowing to damage a carving.



1. Compare the taken-out candle with shown in pictures in Head engine Electric equipment, it will give you useful information about the general condition of the engine.
2. Check shchupy interelectrode distance. Demanded value of a gap is given in Specifications.

At new candles the interelectrode distance is, as a rule, established correctly.
If the carving of a candle has damage, it is necessary to replace it. For this purpose there is the corresponding tool and a repair kit, in particular BERU. By means of a special drill the old carving opening can be passable. For this purpose it is not necessary to remove a head of cylinders. After that in a head of cylinders the new carving can be cut and by means of a special carving insert the candle is screwed. Carving inserts sit reliably and tightly.

3. For distance installation between contacts turn in the corresponding mass electrode. For this purpose knock sideways on a mass electrode. At a podgibaniye обоприте a small screw-driver about carving edge. Do not lean at all on the central electrode as it can be damaged.
4. Put a little medsoderzhashchy anti-taking structure on a carving of a new candle. Establish a candle in a head of cylinders and screw it fingers against the stop, then tighten by means of a head of a candle key. If it is possible, use for a candle tightening a dinamometrichesky key to be sure that it is established correctly. The effort of a tightening of candles is included in Specifications.

In order to avoid possibility of a vvinchivaniye of a candle not on a carving put on its shaft a small piece of a rubber hose or a plastic tube. The flexible tube will work as universal - the kardanny hinge, providing candle alignment in relation to a candle nest and in case the candle starts to warp, the hose will slip on it, without giving possibility to strip a thread.

5. Before connection to a candle of high-voltage (VV) of a wire carefully examine it on damages, corrosion of internal contact and measure resistance. If it considerably exceeds 30 kiloohms/meters – replace all set of wires.
6. Connect a wire to the established new candle, again using a rotary motion and holding the socket while it will not be put on a candle up to the end.
7. Repeat the procedure described above for other spark plugs consistently to avoid the wrong connection of candle VV of wires.