(from Kleemann Press
Release) KLEEMANN is proud to present a new and highly
improved version of the scissor door system, now available with a
fully automatic hydraulic opening and closing system. The KLEEMANN
scissor doors system is a truly unique styling product for the
stunning Mercedes-Benz roadster SL (R230).
Many companies through the years have built "Gullwing" or "Pivot"
door mechanisms. Historically these door mechanisms have been
nothing more than gas spring aided parallel hinges, crude in their
design and function. KLEEMANN set out to design and build a truly
unique hinge and opening mechanism befitting the marque and the
expectations of their owners.
Mercedes-Benz set the stage in 1954 with the introduction of the 300
SL whose doors opened upward on a roof-mounted hinge with the help
of a gas charged shock. The opening was required to allow easy
access over the wide rocker panel structure. In the late 1970's
Lamborghini introduced the Countach with its forward pivoting doors,
which were required because one couldn't close a standard hinged
door once inside the vehicle. Both of these solutions relied on
purely mechanical parts and were cumbersome to operate, requiring
great dexterity and strength.
The KLEEMANN Scissor Door system uses a unique two-axis hinge
mechanism. A hydraulic station, containing a high-pressure pump and
sophisticated control valve assembly, is located in the trunk.
Hydraulic lines are run through the chassis to each A-pillar where
the hinge mechanism is located. To enter the vehicle simply pull the
OE door handle. An electronic signal is sent to the processor in the
hydraulic station and the appropriate process take place to open the
The process in entirely automated: The door first moves outward 80
mm, and then swings up in an arc, hence the name "Scissor". A
generous opening allows easy access to the vehicle. The opening
procedure requires only ten seconds from start to finish. To close
the door simply press the button located on the bottom edge of the
door, within easy reach of a seated position, and the process
reverses itself. Over centre cam action "closer aid" insures that
the door is positively closed. None of the vehicles structure is
compromised, neither in the A pillars nor door, the crash integrity
of the vehicle is left in tact.
KLEEMANN paid great attention to the aesthetics of the opening
process itself, to simply swing the door forward on a single plane
is too cold and simple. Drawing from nature, a compound path was
developed that mimics a bird's wing in flight. As the door swings up
and forward the outer edge of the door folds outward, an elegant and
The KLEEMANN Scissor Door mechanism combines a state of the art
electronically controlled hydraulic system with a beautiful opening
motion to provide the ultimate in personal expression. Like all
KLEEMANN products, functionality is as important as form, nothing is
extraneous or unnecessary.