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
+ 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
   Specifications
   Diagnostics of malfunctions of onboard electric equipment - the general information
   Check of the electric motor of a screen wiper
   Check of the warmed back glass
   Relay and safety locks
   Replacement of glow lamps of devices of external lighting
   Replacement of glow lamps of devices of internal lighting
   Removal and installation of the sensor of daylight
   Removal and installation of a headlight
   Removal and installation of a fog light
   Removal and installation of the lens of a fog light
   Removal and installation of a back lamp
   Replacement of the battery of a key of the ignition/remote control
   Removal and installation of the electric motor of screenwash
   Removal and installation of the electric motor of a cleaner of back glass
   Removal and installation of the tank of water and electric motor of the pump
   Removal and installation of the sensor of a rain
   Removal and installation of a sound signal
   Removal and installation of sensors of the parking
   Removal and installation of the sensor of temperature of external air
   Removal and installation of the control panel
   Removal and installation of the understeering switch
   Removal and installation of the switch of a forward plafond on a ceiling
   Removal and installation of group of switches to the left of the control panel
   Removal and installation of the switch of the central console
   Removal and installation of switches in the doorway
   Removal and installation of door switches of internal lighting
   Removal and installation of precautionary indexes of the assistant to the parking
   Removal and installation of the lighter
   Removal and installation of the radio receiver
   Removal and installation of a loudspeaker
   Digital tire of data of CAN
   The uniform lock - general information
   Installation of additional electric and electronic devices
   Appointment and arrangement of electric sockets
   + Schemes of electric equipment







Relay and safety locks

Most of consumers of the electric power of the car is protected by fuses. Separate components of system of lighting, except for braking signal lamps, are protected by electronic relays.

At course of too strong current electronic interruption of an electric chain of the protected components is made. Through short time the electric chain automatically again becomes isolated at repeated emergence of malfunction the electric chain is interrupted again.

Use fuses with the required current face value.

Do not repair the fused fuses and do not shunt a crossing point.

Establish the burn-out reason.

Relays are placed in two blocks of safety locks in a luggage carrier, and also in a motive compartment.

 PERFORMANCE ORDER

1. Uncover the block of safety locks and take out the damaged relay by means of special nippers, for example, of HAZET 4770-1.
2. Check operability of the relay and if necessary replace with new, address appropriate section.
3. Install the relay on a payment and close a cover of the block of safety locks.
Safety locks are located in three blocks which are sideways dashboards, in a luggage carrier and in a motive compartment.


Block of safety locks 1

The block of safety locks 1 is from the driver, sideways at the dashboard.

 PERFORMANCE ORDER

1. Depending on execution the cover (1) is taken out from the dashboard by means of the screw-driver or for a ledge.

2. Incline a cover to the left and disconnect it from the top holder.

The cover sits in the top holder very strongly therefore for its extraction the plastic wedge, for example, of HAZET 1965-20 can be required.

3. Incline a cover further to the left, take out the directing tires above and below from openings and take out a cover from the dashboard.
4. At installation insert the directing tires into openings, close a cover and record it in holders.


Block of safety locks 2

The block of safety locks 2 is in a luggage carrier behind side facing.

 PERFORMANCE ORDER

1. Sedan: Take out a cover (1) from facing. Uncover (2) blocks of safety locks.

2. Versatile person: Release a cover (1) in facing and lower it. (2) – block of safety locks.


Block of safety locks 3

The block of safety locks 3 is on the left side in a motive compartment under a cover.

 PERFORMANCE ORDER

1. Open a cowl.
2. Uncover over the block of safety locks. For this purpose turn on ј a turn plastic screws and take out a cover from the directing tire.

3. Release clips (1), pull a cover (2) blocks of safety locks forward and remove.

4. At installation press a cover into the back tire and put on the block of safety locks. At the same time you monitor the correct provision of a cover.
5. Block a cover clips.
6. Put a cover over the block of safety locks. At the same time the cover has to enter the side directing tire.
7. Fix a cover by screws, having turned on ј a turn plastic screws.