Chasis of M-class is settlement between off-road
and comfortable familiar limousine, so the car has
permanent all wheel drive (look at 4th image)
and independent front and rear suspension- rare
in off-road vechicles.
(1st and 2nd image)
Front suspension (1st image)
Triangular transversal rocker-arms and transversal
rod are connected with auxiliary frame. Guiding
column (spring with shock-absorber within) is
fasten between upper rocker-arms.
Rear suspension (2nd image)
The cover of the rear bridge is guided by
longitudinal rocker-arms connected with the
auxiliary frame which is also connected with
lower transversal rocker-arms. Shock-absorbers are
Mercedes is a firm which invented many electronic systems
like ESP, 4-ETS, ASR, BAS or else.
Many of them are used in M-class.
4-ETS(4-Electronic Traction System)-invented
just for M-class, is a system, which substitutes blockade
of differential. This system use ABS sensors to check
the tenacity of wheels. If any wheel loose the tenacity
the system brakes it to correct the traction.
ABS(Anti-block Brake system)- this well known system
invented by Mercedes over 20 years ago prevents blocking
of wheels when car brakes. Thank to ABS driver can pass round
the obstacle while braking. When the sensor shows locking
of wheels ABS regulates pressure in brake system.
Modulator is a part of ABS, which changes or keeps pressure
in brake. M-class has a 4-channel ABS. It means that every
brake has its own modulator. There are also 2-channel
(front and rear modulator), and 3-channel (two front modulators
and one rear).
ESP(Electronic Stability Program)- system which keeps
car stable. It corrects the track by braking one of wheels
or detachment of fuel inflow. It use ABS wheel speed sensors.
It avails also steering angle,brake pressure and lateral
acceleration sensors. It works in all situations: from
accelerating to braking.
ASR- system, which prevents blocking of wheels
BAS-Brems Assistant system which increases pressure
in brake system. It acts when the driver pushes brake too
weak. In servo there is additional electromagnetic valve
which is started by electromagnetic driver when the sensor
gives a signal.
Common-Rail- injection system used in diesel engines
among others ML 270 CDi.
Principal eliment of Common Rail system is high-pressure
fuel tank- fuel accumulator. Fuel is delivered to common rail
by eccentric pump.
Common rail is connected with atomizing cone, and atomizing
cone is connected with electronicaly controled electromagnetic
valves which deliver the fuel to cylinders.
Common rail is used only in direct injection diesel engines.
Adventure with M-Class
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