Mercedes-Benz S 450 4MATIC Operator's Manual page 647

Practical hints
What to do if ...?
Display Possible cause/consequence
DISTRONIC PLUS DISTRONIC Plus* is switched off and is
Currently Unavailable temporarily unavailable.
See Oper. Manual
DISTRONIC Plus* is deactivated if:
the DISTRONIC Plus* cover in the radi-
ator grille is dirty
the radar sensors* do not sense any
other vehicles or objects, i.e. road sign
or similar to this, for a long time
the system is overheated
its function is impaired as a result of
heavy precipitation or fog
the battery voltage is insufficient
DISTRONIC Plus* is switched off because
the radar sensor system* is temporarily in-
operative due to electromagnetic interfer-
ence near television and radio transmitter
stations, toll stations, speed measuring
systems, etc.
DISTRONIC PLUS DISTRONIC Plus* is malfunctioning.
Inoperative BAS Plus* and PRE-SAFE
not available.
646
Possible solution
Clean the DISTRONIC Plus* cover in the radiator grille
( page 619).
Restart the vehicle.
Try activating DISTRONIC Plus* again later.
Wait until the system cools down or the battery recovers.
DISTRONIC Plus* will be operational again without you needing to
restart the engine if:
the dirt (e.g. slush) loosens while you are driving
the system detects that the radar sensors* are fully available
again
the message in the multifunction display disappears
Wait until the message in the multifunction display disappears.
Contact an authorized Mercedes-Benz Center as soon as pos-
®
Brake* are also sible.