290 OperationIn the “Operation” section you will find de-
tailed information on operating, maintain-
ing and caring for your vehicle.The first 1 000 miles (1 500 km)
The more cautiously you treat your vehicle 
during the break-in period, the more satis-
fied you will be with its performance later 
on.
Drive your vehicle during the first 
1 000 miles (1 500 km) at varying but 
moderate vehicle and engine speeds.
During this period, avoid heavy loads 
(full throttle driving) and excessive 
engine speeds (no more than 
2/3 of 
maximum rpm in each gear).
Shift gears in a timely manner.
Avoid accelerating by kickdown.
Do not attempt to slow the vehicle 
down by shifting to a lower gear using 
the gear selector lever.
Select positions3,2or1 only when 
driving at moderate speeds (for hill 
driving).
Select modeC as the preferred shift 
program (
page 169) for the first 
1 000 miles (1 500 km).After 1 000 miles (1 500 km), you may 
gradually increase vehicle and engine 
speeds to the permissible maximum.
All of the above instructions, as may apply 
to your vehicle type, also apply when 
driving the first 1 000 miles (1 500 km) 
after the engine or the rear differential has 
been replaced.
!Additional instructions for AMG 
vehicles:
During the first 1 000 miles 
(1 500 km), do not exceed a speed 
of 85 mph (140 km / h).
During this period, avoid engine 
speeds above 4500 rpm in each 
gear.
iAlways obey applicable speed limits. 
464 Technical termsMultifunction steering wheel
Steering wheel with buttons for operat-
ing the control system.
Normal occupant weight
(
page 337)
OCS
(Occupant C
lassification S
ystem) 
The system automatically turns the 
front passenger front air bag on or off 
based on the classified occupant size 
category determined by weight sensor 
readings from the seat.
Overspeed range
Engine speeds within the red marking 
on 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.
Parktronic (Parking assist)*
System which uses visual and acoustic 
signals to assist the driver during 
parking maneuvers.Poly-V-belt drive
Drives engine-components (alternator, 
AC compressor, etc.) from the engine.
Power train
Collective term designating all 
components used to generate and 
transmit motive power to the drive 
axles, including
engine
clutch/torque converter
transmission
transfer case
drive shaft
differential
axle shafts/axles
Production options weight
(
page 337)Program mode selector switch
Used to switch the automatic transmis-
sion between regular operationS and 
comfort operationC.
CLK 55 AMG with steering wheel gear-
shift control and manual shift program: 
In addition toS andC (for regularS or 
comfortC operation, see above) you 
can use theM for manual shift 
program.
PSI
(P
ounds per S
quare I
nch)
(
page 337)
Recommended tire inflation pressure
(page 337)
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.