Mercedes-Benz 2007 SLR Mclaren Technical Information download pdf (Page 99)

Occupant restraint systems • Mercedes-Benz passenger cars

Rescue

Guidelines for Rescue Services • Passenger Cars 2008 • Issue Date: July 2008

Reversible emergency tensioning retractors with PRE-SAFE

The preventive passive occupant protection system

PRE-SAFE can recognize critical driving situations that

present an increased accident hazard, and prepare the

vehicle and occupants preventively for a possible colli-

sion:

• The driver and front passenger seat belts are

reversibly tensioned by means of an electric motor

• Depending on the vehicle equipment, the front

passenger seat can be moved to a better

longitudinal position and the cushion and backrest

angles can be adjusted to a more favorable

position.

• In vehicles with electrically adjustable individual

rear seats, the inclination angle of the seat cushion

can be optimized

The aim of this system is to move the occupants into

the best possible position before any collision so that

the seat belts and airbags can provide optimum

protection in the crash.

When skidding outside the ESP controlled range,

which could ultimately cause the vehicle to rollover,

the sliding roof (when open) is closed.

Reversible emergency tensioning retractors

The seat belt emergency tensioning retractors in the

inertia reels are electrically operated and reversible. If

an accident is prevented, the preventive emergency

tensioning retraction loosen the seat belts again.

P91.40-2456-00

Reversible emergency tensioning retractor

P91.40-2457-00

Buckle emergency tensioning retractor

i Note

The pyrotechnical tensioning devices on vehicles

equipped with PRE-SAFE may consist of buckle

emergency tensioning retractors (model 164, 211,

221, 251...) or reel tensioners (model 204).

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Mercedes-Benz 2007 SLR Mclaren Technical Information Page 99