104 Introduction of the New smart fortwo coupé and smart forfour | Model Series 453
Bodyshell
Body
Bodyshell structure
The bodyshell of model series 453 is basically a further de-
veloped version of the predecessor with adaptations. These
relate to the changes in boundary conditions, such as the
shared platform with the smart forfour, its production at
various production locations and advanced technical require-
ments, particularly in relation to crashes (e.g. stricter rating
requirements, USA).
The development process took into account both the re-
quirements of the powerplant variants with conventional
combustion engine and the requirements of the subsequently
planned variants with electric motor.
Specific crash requirements for markets in Europe, Asia and
America were also incorporated in the development process.
The most important features of this shared platform include:
• Special yielding crossmembers under the windshield
• Center tunnel designed as a closed section
• No longitudinal members under the main floor
• Central connection of De Dion rear axle
• Realization of a load stage through different mounting
points for the integral carrier variants (for requirement-
based adaptation to vehicle weight and crash design)
• V-shapes as additional load path (smart fortwo only)
Each individual bodyshell element has been developed to suit
the loads it will encounter in terms of its geometry, material
thickness, joining technology and material quality.
In contrast to the predecessor model series 451, the bo-
dyshell of model series 453 has a greater proportion of
ultrahigh strength, press-hardened steels as well as ultrahigh
strength multiphase steels (27% in two-seater/24% in four-
seater) in order to fulfill passive safety requirements. These
are used both in the sidewalls and to a large extent in the
substructure as well, particularly on the two-seater.
The bodyshell of the new smart is subdivided into the fol-
lowing assemblies:
• Front end
• Front end with firewall
• Substructure including rear end structure
• Le/right side wall
• Roof
– This printout will not be recorded by the update service. Status: 06/2014 –
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