386 Technical terms
Memory function*
Used to store three individual seat, 
steering wheel and mirror positions for 
each SmartKey.
MON
(M
otor Octane Number)
The Motor Octane Number for gasoline 
as determined by a standardized meth-
od. It is an indication of a gasoline’s 
ability to resist undesired detonation 
(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.
Multifunction display
A display field in the instrument cluster 
used to present information provided 
by the control system.
Normal occupant weight
(
page 274)Overspeed range
Engine speeds within the red marking 
of the tachometer dial. Avoid this en-
gine speed range, as it may result in se-
rious engine damage that is not 
covered by the Mercedes-Benz Limited 
Warranty.
Poly-V-belt drive
Drives engine-components (alternator, 
AC compressor, etc.) from the engine.
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
Differential
Axle shafts/axlesProduction options weight
(
page 275)
PSI
(P
ounds per square inch)
(
page 275)
Recommended tire inflation pressure
(
page 275)
Rear Parking Assist*
System which uses visual and acoustic 
signals to assist the driver during park-
ing maneuvers.
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 system
Seat belts, belt tensioner, airbags and 
child seat restraint systems. As inde-
pendent systems, their protective func-
tions complement one another.