463 Technical terms
Power train
Collective term designating all compo-
nents used to generate and transmit 
motive power to the drive axles, includ-
ing:
Engine
Clutch/torque converter
Transmission
Transfer case*
Drive shaft
Axle shafts/axles
Production options weight
(
page 334)
PSI
(Pounds per s
quare i
nch)
(
page 334)Program mode selector switch
Used to switch the automatic transmis-
sion between standard operationS and 
operationC.
E 55 AMG with steering wheel gearshift 
control and manual shift program: in 
addition to S and C (for sporty S or 
comfortable C operation), you can use 
M for manual shift program.
Restraint systems
Seat belts, belt tensioners, air bags and 
child restraint systems. As indepen-
dent systems, their protective func-
tions complement one another.
Rim
(
page 334)RON
(R
esearch O
ctane N
umber)
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.
SBC 
(S
ensotronic B
rake C
ontrol) 
Electronically controlled hydraulic 
braking system for increased braking 
safety and comfort.
Shift lock
When the vehicle is parked, this lock 
prevents the transmission selector le-
ver from being moved out of positionP 
without the ignition or engine on and 
brake pedal depressed.