Eco Power Steering Pump - Mercedes-Benz viano 639 series Introduction Into Service Manual

Chassis

ECO power steering pump

On the new Vito and Viano, an electronically
controlled orifice (ECO) is flange-mounted to the
power steering pump.
This valve is actuated by the ESP control unit in corre-
lation with the steering angle, the steering angle rate
of change and the vehicle speed and serves to regu-
late the power steering pump volume flow.
Reducing the volume flow causes the passage pres-
sure in the power steering fluid circuit to drop and thus
reduces the pump's power consumption.
Advantages
• Improved fuel economy
• Reduced CO2 emissions
• Better steering feel at higher speeds
17" light alloy rim
The new 17" light alloy rim enhances the perceived
value of the Viano's AMBIENTE line. The eye-catching
dovetail design is characterized by a sporty yet
elegant look combined with a powerful, robust
charisma.
The hub is adorned by the blue circle with the
Mercedes-Benz inscription. This rim comes standard
on the Viano AMBIENTE and is available for all other
vehicle variants as special equipment.
17" light alloy rim
Introduction of the New Vito/Viano, Model Series 639 l 23
– This printout will not be recorded by the update service. Status: 07 / 2010 –