Mercedes-Benz viano 639 series Introduction Into Service Manual page 19

Interior
Sliding door
Easy, ergonomic operation was at the focus of devel-
opment of the sliding door's inside handle.
The previous location of the push button required the
passenger to twist his or her wrist to push the button.
The push button has now been moved so that the
direction of operation coincides with the natural
movement of the thumb. This allows for better access,
a tighter grip on the handle and easier operation of the
push button.
Developers also paid special attention to the oper-
ating forces required. By reengineering the release
kinematics, it was possible to reduce the force needed
to operate the sliding door from the inside by
approximately 20 N.
Ambiance illumination
Four LEDs in the rear and two in the footwell produce
the ambiance illumination in the footwell. These LEDs
are dimmed at night, but shine at full capacity when
the door is opened to serve as additional entrance illu-
mination.
The LEDs in the restyled grab handles gently illuminate
the ceiling to produce a pleasant sense of spacious-
ness when traveling at night.
18 l Introduction of the New Vito/Viano, Model Series 639
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Eletric sliding door inside handle
Mechanical sliding door inside handle