221 Controls in detail
Driving systems
Deactivating Distronic
There are several ways to deactivate the 
Distronic system:
Briefly tip the cruise control lever in the 
direction of arrow3 (
page 218).
or
Step on the brake pedal.
Distronic will be deactivated. The last 
speed set will be stored in memory.Distronic deactivates automatically when:
you set the parking brake
you drive slower than 25 mph 
(40 km / h)
the ESP is active (
page 76) or you de-
activate the ESP
you move the transmission selector le-
ver into positionN
A signal will sound. The 
Distronic off
 
message appears in the multifunction 
display for approximately five seconds.Setting the following distance in 
Distronic
You can set the specified following dis-
tance for Distronic by varying the time set-
ting between 1.0 and 2.0 seconds. Using 
this time setting and the current speed of 
your vehicle, Distronic calculates and sets 
the required following distance to the vehi-
cle ahead. The set distance will be shown 
in the multifunction display field.
The thumbwheel for making the time set-
ting is located on the lower section of the 
center console.
iThe following message will appear in 
the multifunction display for approxi-
mately five seconds: 
Distronic off
.
The last stored speed is deleted when 
you turn off the engine.
Warning!
G
Distronic switches off and releases the 
brakes when the vehicle decelerates below 
the minimum speed of approximately 
25 mph (40 km / h) by operation of the sys-
tem. At that time the driver must apply the 
brakes in order to reduce vehicle speed fur-
ther or bring it to a stop.
Warning!
G
It is up to the driver to exercise discretion to 
select the appropriate setting given road 
conditions, traffic, driver’s preferred driving 
style and applicable laws and driving recom-
mendations for safe following distance. 
292 OperationTires and wheels
Activating the tire inflation pressure 
monitor
You must activate the tire inflation pres-
sure monitor in the following cases:
If you have changed the tire pressure
If you have replaced the wheels or tires
If you have installed new wheels or 
tires
Make sure the tire pressure is correctly 
set.
Press buttonè orÿ on the mul-
tifunction steering wheel repeatedly 
until the standard display menu ap-
pears in the multifunction display 
(page 134).
Press the j or k button repeat-
edly until you see the current inflation 
pressures for each tire appear in the 
display
or the following message appears in 
the displayTire pres. monitor
 
Pres. display after driving a few 
mins. Reactivate using R button
Warning!
G
The tire inflation pressure monitor does not 
indicate a warning for wrongly selected in-
flation pressures. Always adjust tire inflation 
pressure according to the label on the fuel 
filler cap.
The tire inflation pressure monitor is not 
able to issue a warning due to a sudden dra-
matic loss of pressure (e.g. tire blowout 
caused by a foreign object). In this case 
bring the vehicle to a halt by carefully apply-
ing the brakes and avoiding abrupt steering 
maneuvers.iOperating radio transmission equip-
ment (e.g. wireless headsets, two-way 
radios) in or near the vehicle could 
cause the tire inflation pressure moni-
tor to malfunction.
iIf transporting a deflated road wheel or 
additional wheel sensors in the vehicle, 
the tire inflation pressure monitor 
should not be reactivated until the de-
flated wheel or additional wheel sen-
sors have been removed from the 
vehicle. Otherwise, the deflated wheel 
or additional sensors could cause the 
tire inflation pressure monitor system 
to malfunction.