Mercedes-Benz E-Class Series 207 Service Manual page 13

Highlights
7 ECO power steering pump
The ECO power steering pump is based on a
conventional power steering pump with additional
electronic control of the flow rate. In straightline
driving the flow is reduced to a defined minimum.
When the steering wheel is turned, the delivery rate
is increased to the necessary level according to the
vehicle speed. Reducing the delivery rate during
straightline driving decreases the system flow pres-
sure and therefore reduces the system temperature
and the fuel consumption.
8 Radiator shutters
The flow of cooling air through the cooling module
and engine compartment can be regulated by
opening the radiator shutters.
Closing the radiator shutters prevents the engine
compartment from cooling down at low outside
temperatures while increasing the heating power
available in the passenger compartment. In addi-
tion, the aerodynamic drag of the vehicle decreases
due to the reduced input of cooling air (in the E 350
and E 350 CGI).
1 Radiator shutters open
12
Introduction of the New E-Class Coupé, Model Series 207
b
P20.20-2373-00
– This printout will not be recorded by the update service. Status: 01 / 2009 –
9 Shift point display
(with 6-speed manual transmission)
The shift point is displayed in the multifunction
display of the instrument cluster. Based on informa-
tion from the engine control unit, the driver can
always see when he should change to a different
gear in the interests of fuel economy. This enables
the driver to optimize his driving style to save fuel.
10 Alternator management
The alternator is switched off-load when the charge
level is sufficiently high (80%). This means that the
vehicle is only supplied by the battery, and the
battery is charged by occasionally coupling in the
alternator during brake applications and in deceler-
ation mode.
11 Engine optimizations
Engines with high outputs and low fuel consump-
tion are used. The 4-cylinder diesel engines feature
2-stage turbocharging.
The 6-cylinder gasoline engine features direct injec-
tion instead of port injection (in the E 350 CGI).
2 Radiator shutters closed
P20.20-2374-00