Mercedes C-Class

W203 since 2000 of release

Repair and operation of the car



Mercedes-Benz
+ Mercedes-Benz cars of class C (W-203)
+ Operation manual
+ Routine maintenance
- Engine
   Check of a compression in engine cylinders
   Check of the engine by means of the vacuum gage
   Removal and installation of a cover of a motive compartment from the bottom
   + 4-cylinder petrol engines
   - 6-cylinder petrol engines
      Removal and installation of a head of cylinders
      Replacement of chains of the GRM drive and installation of phases of gas distribution
      Removal and installation of a maple belt
   + Diesel engines
   + Engine lubrication system
+ Cooling system and heating
+ 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







6-cylinder petrol engines

Main data

Basic elements of the engine 112 are presented on illustrations. 3 valves (2 inlet and 1 final) and 2 spark plugs on each cylinder are used. The special device allows to disconnect control of valves for decrease in fuel consumption (address materials of the Head of the Power supply system and release). The resonant inlet pipeline changes the length for each cylinder separately by means of electronically controlled gates with servo-drivers.

6-cylinder petrol engine of 3.2 l (112)


1 — an air absorption Hose
2 — a gas distribution mechanism Chain
3 — the Oil filter
4 — the power steering liquid Tank
5 — the Pulley of a bent shaft
6 — the conditioner Compressor
7 — the Measuring instrument of mass of air
8 — the Fuel distributive highway
9 — the Injector
10 — the ignition Coil
11 — the Spark plug
12 — the Final collector
13 — the case Pallet

Engine 112 elements

1 — the Block of cylinders
2 — Heads of cylinders
3 — Laying of heads of cylinders
4 — Covers of heads of the block
5 — Laying of covers of heads of the block
6 — Inlet valves
7 — Final valves
8 — Valvate levers
9 — Axes of valvate levers
10 — the Top saddle of a valvate spring
11 — the Valvate spring
12 — the Lower saddle of a valvate spring
13 — valve Crackers
14 — Maslootrazhatelny caps
15 — the Auxiliary tube for landing of a maslootrazhatelny cap
16 — Pushers of valves
17 — a valve Saddle
18 — the Cam-shaft
19 — the Forward cover of the GRM drive
20 — a cam-shaft Asterisk
21 — a crankshaft Asterisk
22 — the Intermediate gear wheel
23 — a GRM drive Chain
24 — Natyazhitel
25 — the Boot of a natyazhitel of a chain
26 — Uspokoiteli of a chain
27 — Piston rings
28 — the Piston
29 — the rod finger Plug
30 — the Rod
31 — Inserts of conrod bearings
32 — the Forward epiploon of the crankshaft
33 — Inserts of bearings
34 — Persistent half rings
35 — the Crankshaft
36 — the Back epiploon of the crankshaft
37 — the Cover with a back epiploon of the crankshaft
38 — the Damper of tortional fluctuations
39 — a crankshaft Pulley
40 — the case Pallet
41 — the Oil pump
42 — the Asterisk of the oil pump
43 — the Chain of the drive of the oil pump
44 — the Lever of a natyazhitel
45 — Pruzhina of a natyazhitel
46 — the Finger
47 — the Oil cooler

Air streams of the inlet pipeline with changeable geometry 12

22 — the Operating gate
And — Intake of air at the open gate
In — Intake of air at the closed gate
With — To the engine
D — Air from the air filter

Management of an admission and release on petrol engines 112

12 — the Inlet pipeline
17 — the Fuel highway
19 — the Final collector with isolation of an air gap
22 — the Resonant gate
R4 — Spark plugs (double sparking)
Y62 — the Injector