Mercedes C-Class

W203 since 2000 of release

Repair and car operation



Mercedes-Benz
+ Mercedes-Benz Cars of a class C (W-203)
+ Operation manual
- Routine maintenance
   Specifications
   Indicator of term of approach of planned maintenance (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
   Checks of brake system. Adjustment of the parking brake
   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 control of a box of gear shifting on leakages of oil
   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 level of liquid of system of adjustment of a road clearance
   Check of central air of air
   Cleaning of the mechanism of the movable panel of the hatch of a roof
   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 the battery of system of an emergency call of Tele-Aid
   Replacement of an element of the filter of air of salon / coal filter of purification of air
   Check, cleaning and greasing of the coupling device
   Replacement of brake liquid
   Check of the elastic coupling of the driveshaft
   Check and replacement of spark plugs. Check of a condition of high-voltage wires
   Replacement of an element of the air filter of the engine
   Replacement of the fuel filter
+ Engine
+ cooling and heating Systems
+ Power supply system and release
+ engine Electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment







Check of levels of liquids, control of leaks

Below procedures of check of levels of the liquids, made each 1000 km of run, monthly and before each distant trip are described. The description of other checks of levels of liquid can be found further in the Sections devoted to specific procedures of service. Irrespective of check intervals according to the schedule do not allow, that liquid followed under the car, such leaks indicate malfunction which it is necessary to eliminate immediately.


Liquids are the integral component of systems of greasing, cooling, brake and systems of washing of a windscreen. In view of a gradual expense and/or pollution of liquids in the course of normal operation of the car, it is necessary to replace them periodically. Familiarize with the Section «Types and volumes of applied greasings and liquids» in Specifications before starting a liquid dolivaniye in any of listed a component.

At any check of level of liquid the car should stand on an equal surface.


Visually check on existence of a leakage, attritions, cracks and damages the following pipelines, hoses and accessions:

· Toplivoprovoda;
· Hoses of system of cooling;
· Brake pipelines and hoses;
· Hydraulic lines of the amplifier of a wheel;
· Conditioner lines.

Impellent oil

Visual control of leaks

 PERFORMANCE ORDER

1. At the greasy engine and a big consumption of oil check places of leaks. The following places are for this purpose checked:
· Laying of a cover of a jellied mouth on existence of cracks or damages.
· Case ventilation: a ventilating hose from a cover of a head of cylinders to a hose of absorption of air.
· Laying of a cover of a head of cylinders.
· Laying of a head of cylinders.
· Stopper of removal of oil (a round ring).
· Laying of the oil filter: a filter prileganiye to a flange.
· Laying of the pallet of a case.
· Forward and back epiploons of a cranked shaft.
2. As in the presence of a leakage oil extends on a big surface of the engine, a place of leaks at once difficult to define.
3. Wash out the engine. The generator close a plastic package. Spray the engine a usual cold cleaner and through short time wash out water on a car wash.
4. Places of interface and epiploons on the engine strew outside with lime or talc.
5. Check oil level, if necessary add.
6. Make a trial trip. As oil in the hot engine reduces the viscosity and quicker acts in places of leaks, it is necessary to execute a trial trip on distance about 30 km on the high-speed route.
In summary investigate the engine by means of a lamp and localize places of leaks, having eliminated malfunctions.


Check of level of oil shchupy

 PERFORMANCE ORDER

Level of oil is displayed by the indicator located on a control panel (see above). At 4-cylinder petrol engines "271" about 6/02 releases, and also at 6-cylinder petrol engines and at diesel engines the opening for the index of level of oil (1) is closed by a stopper (2). At these engines to check of level of oil at carrying out maintenance it is applied special щуп by ET No. 120 589 07 21 00.

4-cylinder petrol engine

 PERFORMANCE ORDER

1. Pass on the car for warming up of the engine and stop on an equal platform.
2. After a stop of the engine wait for about 5 mines that oil flew down in the case pallet.
If to start measurement of level of impellent oil right after engine switching off, the part of oil remains in the top part of the engine that will essentially be reflected in accuracy of measurement.

3. Take out the index of level of oil (1) and wipe it a pure rag. (2) – an opening cover for an oil flood.

4. Enter into an opening against the stop the index of level and again take out it.

5. Check oil level according to the index. It should be between MAX (3) and MIN (4) marks.

If level of oil lies above MAX mark, there is a danger of damage of the catalytic converter.

6. If level of oil is at a mark (4) or below, it is necessary to add oil to MAX mark. The difference in oil levels between marks of MAX and MIN corresponds to volume in 2 l.

If casually oil was poured, it is necessary to suck away it by means of the special device.

7. Oil is added through a stopper (2) covers of a head of cylinders. (1) – the index of level of oil (address to an illustration 5.10). For a dolivaniye use only the oil specified in Specifications.

Any combination of oils of various types is not recommended. Whenever possible it is not necessary to mix also oils of one type, but various brands. Impellent oils of one type, one brand, but various viscosity, if necessary, can mix up.


6-cylinder petrol engine 112, diesel engines

 PERFORMANCE ORDER

1. Pass on the car to warm up the engine and stop the car on an equal platform.
2. After a stop of the engine wait for about 5 mines that oil flew down in the case pallet.

3. Uncover (1) an opening for the index of level of oil (2). (3) – the fuel filter, on an illustration is shown the diesel engine 611.

4. Insert into an opening against the stop special щуп definitions of level of oil.
5. Later 3 seconds take out the index of level and check on it oil level.

Engine 112:
Level of oil it agrees щупу Oil volume
120 mm 4.00 l
126 mm 4.50 l
132 mm 5.00 l
140 mm 5.50 l
148 mm 6.00 l
154 mm  6.46 l
161 mm 7.00 l
168 mm 7.50 l
175 mm 8.00 l
183 mm 8.50 l
187 mm 8.75 l

6. Petrol engine 112: Pererasschitayte level of the oil given in the table, in the corresponding volume. Define a difference and if necessary add it in the engine.
7. Diesel engines 611:

Engines to No. 448 572 (Инд.№ 30, plant in Untertyurkhayma) and No. 069 844 (Indus. No. 40, plant in Berlin)

MAX = 138 mm,
MIN = 110 mm.

Engines since No. 448 573 (Indus. No. 30, plant in Untertyurkhayma) and the engine No. 069 845 (Indus. No. 40, plant in Berlin) –

MAX = 127.5 mm,
MIN = 99.5 mm.

Indus. No. is behind 6-digit designation of model of the engine, for example, «611.962».

8. Diesel engine 612:

Engines to No. 134 163

MAX = 135 mm,
MIN = 110 mm.

Engines since No. 134 164

MAX = 124.5 mm,
MIN = 99.5 mm.

9. Diesel engine 612: level of oil should be between MAX and MIN marks.


Consumption of impellent oil

Max. 1L/1000 km, depending on style of driving.

The consumption of oil can be defined by the engine only after passing of a long distance. In a running in it can exceed the given value. Frequent movement with high turns of the engine conducts to increase in a consumption of oil.

Check of level of oil is important preventive procedure. Continuous falling of level of oil indicates or existence of its leaks through the damaged epiploons or weakened connections, or on its burning out (internal leaks through worn-out piston rings or via directing plugs of valves). Besides, it is necessary to pay attention and to a condition of the oil. If oil has dairy color or in its structure it is possible to notice water drops, it indicates possible violation of tightness of laying of a head of cylinders or crack existence in a head or the block of cylinders. In this case the engine should be repaired immediately. Each time at measurement of level of oil before edge rubbing щупа carry out on it big and index hand fingers. If will be thus found stuck on щуп particles of dirt or metal particles, oil it is necessary to replace (address to the Section Replacement of impellent oil and the oil filter).

Engine cooler

 PERFORMANCE ORDER

 Do not allow antifreeze hit on your skin or on the painted surfaces of the car. If it nevertheless occurred, immediately wash away antifreeze a plentiful quantity of water. Antifreeze is extremely toxic in a case hit in an organism. Never leave it without supervision in the open container or spilled on a floor; or animals its sweet smell can involve children and they can drink it.

1. All cars considered in this Management, are equipped with cooling system with superfluous pressure of compensatory type. The white plastic broad tank is located in an impellent compartment and connected by a hose to a radiator. In process of an engine warming up in the course of its work the extending cooler fills a tank. When cooling engine the cooler automatically arrives back in cooling system that provides maintenance of constant level.

2. Check of level of a cooler in the tank should be made regularly, at strictly horizontal position of the car and the switched-off engine. In a cold condition of cooling liquid its level should reach in a broad tank the level specified by an arrow an illustrations.

In a hot condition of cooling liquid level should be higher approximately on 1.0 cm.
Add 40 %/60 %-nuyu an antifreeze mix on a basis этиленгликоля with water. It is necessary to apply the structure specified in Specifications.

Do not uncover a jellied mouth of a broad tank or a radiator cover for check of level of a cooler before complete cooling of the engine! Level in the tank fluctuates depending on engine temperature. When engines cold, level of a cooler should be higher than "MIN" label on the tank. In process of engine heating level should come nearer to «MAX» label. If it not so, let's to the engine cool down and then uncover the tank.

3. Banish the car and again measure cooler level. If to the necessary level it is required to add only small amount of a cooler, for this purpose it is possible to use pure water. However frequent additions of water will dilute antifreeze. To provide a normal ratio of antifreeze and water, always add to the necessary level a demanded mix.
4. If level of a cooler falls regularly, in system leak existence is possible. Examine a radiator, hoses, a cover of a jellied mouth, drain jams and the water pump (address to the Section Check of functioning of system of cooling and frost resistance of cooling liquid. Liquid replacement). If leaks it is not revealed, make check of tightness of a cover of a broad tank and a radiator in conditions HUNDRED.
5. If you need to uncover, wait, while the engine completely will cool down, then wrap up a piece of thick rags round a cover and unscrew it to the first emphasis. If thus from under a cover steam or a cooler starts to escape, let's to the engine cool down a little more, and only then uncover.
6. It is necessary to check a cooler condition also. It should be rather pure. If liquid has brown or rusty color, it it is necessary to merge, wash out system and to fill it with a new mix. Even if the cooler looks normally, inhibitors of corrosion entering into its structure lose over time the efficiency therefore it is necessary to replace it through certain periods.
7. For check of frost resistance of cooling liquid it is necessary to use the areometer.


Brake liquid

 PERFORMANCE ORDER

Brake liquid can harm your eyes and damage the painted surfaces of the car therefore be extremely careful at the treatment of her. Do not use brake liquid which long time stood opened or to which is more than one has some. Brake liquid has property to absorb moisture from air that can lead to dangerous loss of efficiency of brake system. Use only the recommended type of brake liquid. Mixing of various types of liquid can lead to refusal of brake system.


1. The tank for brake liquid (1) is behind at the left in an impellent compartment. It has two chambers, everyone for the brake contour.

2. Level of brake liquid is checked visually, on labels on the plastic tank established on the main cylinder. At the closed cover level of brake liquid should be between MAX (2) and MIN (3) marks.Если level below admissible, at first wipe top of the tank and a cover pure rags to prevent dirt hit in system after cover removal. Add to the necessary level the recommended liquid, but do not pour.
3. While the tank cover is removed, check liquid and the tank of the main cylinder on existence of pollution.
If at it there are particles of a rust, dirt or a water drop, liquid from system it is necessary to merge and fill in the new.
4. After tank addition to the necessary level make sure that the cover is established exactly, in order to avoid leakages of liquid and/or dirt hit.
5. Liquid level in the main cylinder will fall slightly as a result of wear process of frictional overlays of brake shoes. There is no need to add it until level remains near «MIN» label; it will rise after replacement of slips. Very low level can indicate wear of brake shoes. Check them on wear existence (address to the Section of Check of brake system. Adjustment of the parking brake).
6. If level of brake liquid constantly falls, immediately check all system on existence of leaks. Survey brake lines, hoses and shtutserny connections, together with supports, wheel cylinders and the main cylinder (address to Sections of Check of brake system. Adjustment of the parking brake, Check of a condition and replacement of hoses of an impellent compartment, localization of leaks).
7. If at check of level of liquid the tank appears is empty or nearly is empty, the brake system should be checked on existence of leaks and is pumped over (address to Head Coupling and power shafts).


Check of level of oil in the tank of hydraulic system of the amplifier of a steering

The tank of hydraulic system of the amplifier of a steering is in a back part of an impellent compartment. Address to the Section Check of level of liquid of system of hydrostrengthening of a wheel.

Liquid of a washer of a windscreen

The concentrate of steklomoyushchy means is easily combustible.

At the address with a concentrate of steklomoyushchy means application of fire, an open flame and smoking are forbidden.

 PERFORMANCE ORDER

1. Open a cover (1) and check visually liquid level.

2. If necessary add a mix from a concentrate for a sink of glasses and drinking water. Capacity of the tank is given in Specifications.
3. In areas with a temperate climate it is possible to fill system with usual water, but it is recommended to add in water means for washing of glasses. The tank should be filled no more, than on two thirds that there was a free space on a case of expansion of water when freezing. In areas with cold climatic conditions it is necessary to use special antifreeze for the windscreen washing, reducing a freezing point of liquid which can be got in any shop of automobile accessories. Usually it is on sale in the concentrated or ready look. If you got the concentrated antifreeze, mix it with water according to the instruction of the producer on packing.

For models with warmed jets, as a rule, sufficient frost resistance of a mix to - 10°С.


Do not use antifreeze of system of cooling - it will damage the painted surfaces of the car.

4. Check adjustment of jets, address to Head the Body.