Brake system
Chassis
35
l
Introduction to CITAN, Model Series 415
The hand brake acts on the rear disk/drum brakes.
All vehicles (except the A1 panel van) are equipped with internally ventilated sliding caliper disk brakes at the
front and unventilated rear disk brakes. The A1 panel van is equipped with internally ventilated sliding caliper
disk brakes on the front wheels and drum brakes on the rear axle. The hand brake acts on the rear disk/drum
brakes.
Brake force control
The new Citan is equipped with most of the brake
force control systems typically installed on
Mercedes-Benz vans including ESP® with understeer
control (USK) and ASR (acceleration skid control), ABS
(anti-lock braking system), BAS (hydraulic brake
assist) and EBD (electronic brake force distribution).
A Brake Assist System with automatic braking func-
tion provides the maximum braking power in the event
of emergency braking.
The start-off assist function installed as standard
maintains the brake pressure after the brake is
released for a few seconds in order to prevent the
vehicle from rolling back. It is active on slopes as of
approximately 4% when a forward or reverse gear is
engaged.
ESP
The Electronic Stability Program (ESP®) improves
driving stability in various driving situations. The Adap-
tive ESP® 9i vehicle dynamics control system from
Bosch which is used in the vehicle improves handling
characteristics and thus safety because it improves
the directional stability and steerability of the vehicle
at its critical dynamic driving limits.
The ESP® 9i system can access both the brake
system and the engine management system. It contin-
uously evaluates the measurements of the steering
angle sensor, wheel speed sensors, lateral accelera-
tion and yaw rate sensor and assists the driver if the
driving condition of the vehicle becomes unstable.
The ESP® intervenes selectively via the motor elec-
tronics and brake system within fractions of a second
and supports the driver by actively building up brake
force to stabilize the direction of the vehicle in critical
situations. During ESP® and ASR control interven-
tions, the ESP® 9i warning lamp flashes on the instru-
ment cluster.
When the acceleration skid control function is deacti-
vated via the ASR-OFF button, the ESP-OFF warning
lamp lights up continuously. If the system detects an
unstable driving condition, ESP® intervenes and the
ASR switches back on automatically. ASR is always
active above 50 km/h i.e. ASR switches back on when
the vehicle accelerates above 50 km/h and deactiva-
tion is not possible. However, even when the ASR is
switched off, the ESP® warning lamp flashes when the
tires of the vehicle reach their limit of adhesion.
– This printout will not be recorded by the update service. Status: 09 / 2012 –