Mercedes-Benz 2005 SLK-Class Operator's Manual page 436

Technical terms
Roll bar
Occupant protection system which
consists of tubular steel sheathed in
plastic.
RON
(Research Octane Number)
The Research Octane Number for gaso-
line as determined by a standardized
method. It is an indication of a gaso-
line's ability to resist undesired detona-
tion (knocking). The average of both
the ->MON (Motor Octane Number)
and RON (Research Octane Number) is
posted at the pump, also known as
ANTI-KNOCK INDEX.
436
Shift lock
When the vehicle with automatic trans-
mission is parked, this lock prevents
the gear selector lever from being inad-
vertently moved out of position P with-
out the SmartKey turned and the brake
pedal depressed.
Sidewall
( page 324)
Speedshift
Steering wheel gearshift control for ve-
hicles with automatic transmission.
You can change the gears yourself with
the steering wheel gearshift buttons.
SRS
(Supplemental Restraint System)
Seat belts, emergency tensioning
device and air bags. Though indepen-
dent systems, they are closely inter-
faced to provide effective occupant
protection.
Tele Aid system
(Telematic Alarm Identification on
Demand)
The Tele Aid system consists of three
types of response: automatic and man-
ual emergency, Roadside Assistance
and information. Tele Aid is initially ac-
tivated by completing a subscriber
agreement and placing an acquain-
tance call.
The Tele Aid system is operational pro-
vided that the vehicle's battery is
charged, properly connected, not dam-
aged and cellular and GPS coverage is
available.
Tightening torque
Force times lever arm (e.g. a lug
wrench) with which threaded fasteners
such as wheel bolts are tightened.