Mercedes-Benz Body & Equipment Guideline for Metris - BM 447, Version November 27, 2015.
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Please observe the revision notes compared to 09/18/2015 ! Only print out complete sections of the current version!
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7.2 Bodyshell/body
7 Modifications to the basic vehicle
7.2.6
Modifications to the roof structure
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Note
Modifications to the roof structure, including the
rear portal, are only permissible in exceptional cases
and only with a valid upfitter impact study (UIS) from
the department responsible under 1.6 “Contact”
(
a
WARNING
On no account should subsequent modifications be
made to the headliner or roof panel if the vehicle
is equipped with window airbags. Otherwise, the
window airbag may no longer work correctly (e.g.
window airbag deployment is delayed or incomplete).
•
Roof bows or supporting parts may not be removed
or damaged without being replaced.
•
If a roof panel and roof bow are separated and if a
continuous section frame is not possible, at least
two additional roof bows in front of and behind the
position of the removed bow are required.
•
The bows must be secured to the sidewalls in such
a way that a non-positive connection is guaranteed
(bend-resistant connection of bows and roof panel).
•
The maximum roof load must be observed.
•
The maximum permissible location of the center of
gravity must not be exceeded (
•
When mounting a carrier system directly to the rivet
nuts, only mounting consoles approved by
Daimler AG or mounting consoles which correspond
to drawings of Daimler AG may be used as a direct
connection to the roof. Other carrier systems may
only be mounted on these. The load of 25 kg per
support foot and the maximum roof load must not
be exceeded.
•
The following body-specific notes on roof structure
modifications must be adhered to.
Maximum roof load of standard roof
150 kg = 330 lbs
The maximum permissible center of gravity position
must not be exceeded, see 5.1.2 “Maximum permissi-
ble positions of center of gravity” (
Location of roof bows
•
to the rear of the front doors (B-pillar)
•
in the center of the vehicle behind the load com-
partment sliding door (C-pillar)
Isometric view of the roof bows
The strength of the new roof structure must correspond
to that of the standard roof. The minimum moment of
inertia required per roof bow is
Ix = 4,000 mm
4
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