Brake system — general description Cars are equipped with two brake systems that work independently of each other - working and parking. In the event of a failure of one of the systems, the car can be...
Service brake system The Mercedes E-class is equipped with a hydraulic dual-circuit service brake system. Compared to the previous model, it has larger brake discs on both the front and rear...
Anti-Lock Braking System (ABS) Pic. 8.1. Scheme of individual elements of the ABS system: 1 - control unit; 2 - brake mechanism of the front wheel with a speed sensor; 3 – hydraulic block; 4 – the...
Traction control (ASR) The ASR electronic traction control system slows down the spinning wheels at the start and redistributes the torque to the non-spinning wheels. Electronics controls the...
Electronic throttle control The ASR traction control system additionally provides torque reduction. For this, the engine management system is additionally equipped with electronic throttle control...
BAS system (Brake-Assist) Pic. 8.4. In a modern braking system with Brake-Assist, the master cylinder and booster are equipped with electronic elements and are included in the electronic control...
Electronic Stability Program (ESP) Pic. 8.5. Elements of the dynamics control system (ESP) Mercedes–Benz: 1– sensors of frequency of rotation of back wheels; 2 - control unit; 3 - front wheel speed...
Operation of ABS/ASR/BAS/ESP systems In the event of a malfunction (e.g. when a wire breaks) or low voltage in the on-board network (below 10.5V) the safety switch in the electronic control unit is...
Brake check Sequence of work The time shown is 30 min. 1. First brake hard while driving at low speed. 2. Equal in length brake marks from the wheels indicate the simultaneous...
Parking brake system With the help of the parking brake system, arbitrary movement of the car is prevented when stopped. The parking brake is controlled via a cable system and acts on the...
Checking the brake fluid level Despite the fact that the system has only one brake fluid reservoir, if one of the circuits leaks, all the fluid does not leak out, since the reservoir has two chambers....
Checking the brake system for leaks and damage To check the brake system for leaks and damage, the bottom of the body must be dry so that leaks can be seen. Brake fluid can also leak out under a layer of dirt. Dark...
Checking the brake booster Pic. 8.8. Brake booster device: 1 – a pusher rod to the main brake cylinder; 2 - check valve with a rubber gasket; 3 – membrane housing; 4 – a pusher rod from a brake...
Checking the lining thickness For those who service the brake system of their car on their own, this check is the most important. Front pads on vehicles with automatic transmission wear faster. The...
Checking the condition of the brake discs Pic. 8.11. Front wheel brakes with ventilated discs: 1 - bracket; 2 - caliper bracket; 3 – fitting for pumping with a protective cover; 4 - inner block; 5 - connection...
Replacing the front brake pads Only use original or branded (e.g. ATE) replacement parts can guarantee that the required braking distance, the service life of these parts, and the absence of squeaks...
Replacing the rear brake pads Sequence of work 1. Loosen the wheel mounting bolts, raise the vehicle, support it on stands and remove the rear wheel. 2. If a wear sensor is installed, remove its...
Removing the brake caliper Sequence of work 1. Raise the vehicle, secure it and remove the wheel. 2. On the front wheel : Loosen the wear sensor wire and remove its connector. 3. Open the bleed...
Removing the brake disc Sequence of work 1. For removal of a brake disk establish the car on support and fix it. 2. Remove the wheel. 3. Remove the caliper and hang it on a wire so that the...
Removing the brake hose Sequence of work 1. First loosen the union nut of the respective brake line. At the same time, make sure that the pipeline does not rotate while holding the hose on the...
Removal of brake pipelines Inflexible brake lines made of metal are best replaced by a workshop, since a certain amount of experience is required for a quality installation. Sequence of work 1....
Bleeding the brake system Signs of the presence of air in the brake system: after repair, the brake pedal moves to the floor or is pressed with dips during operation; the pedal travel is very...
Brake Fluid Replacement The brake fluid must be changed every two years of operation. At the service station, this procedure is carried out using a special filling device. If your vehicle is...
Parking brake adjustment If the parking brake pedal is depressed more than five positions (clicks) and does not provide sufficient locking, adjustment is required. Adjustment is carried out...
Removing the parking brake pads If the brakes overheat and the pads are burnt, the pad tension springs and the pads themselves must be replaced. Sequence of work 1. Raise and secure the vehicle, remove...