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Technical terms
Power train
Collective term designating all compo-
nents used to generate and transmit
motive power to the drive axles, includ-
ing:
ț Engine
ț Clutch/torque converter
ț Transmission
ț Transfer case
ț Drive shaft
ț Differential
ț Axle shafts/axles
Program mode selector switch
Used to switch the automatic transmis-
sion between standard operation S and
comfort operation C.
S 55 AMG with steering wheel gearshift
control and manual shift program: in
addition to S and C (see above), you
can use M for manual operation.
REST
(Residual engine heat utilization)
Feature that uses the engine heat
stored in the coolant to heat the vehi-
cle interior for a short time after the en-
gine has been turned off.
Restraint systems
Seat belts, belt tensioners, air bags
and child restraint systems. As inde-
pendent systems, their protective func-
tions complement one another.
RON
(R
esearch 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 AN-
TI-KNOCK INDEX.
Shift lock
When the vehicle is parked, this lock
prevents the transmission selector le-
ver from being inadvertently moved out
of position P without the SmartKey
turned and the brake pedal depressed.
SRS
(S
upplemental Restraint System)
Seat belts, emergency tensioning de-
vice and air bags. Though independent
systems, they are closely interfaced to
provide effective occupant protection.