Page 638 of 801
637 Practical hints
What to do if …?
Problem
Possible cause/consequence
Suggested solution
=
The red SRS indicator lamp
comes on while the engine is
running.
There is a malfunction in the supplemental
restraint systems. The air bags or emergen-
cy tensioning devices (ETDs) could deploy
unexpectedly or fail to activate in an acci-
dent.
Drive with added caution to the nearest
authorized Mercedes-Benz Center.
Warning!
G
In the event that a malfunction of the SRS is
indicated as outlined above, the SRS may
not be operational. For your safety, we
strongly recommend that you contact an au-
thorized Mercedes-Benz Center immediate-
ly to have the system checked; otherwise
the SRS may not be deployed when needed
in an accident, which could result in serious
or fatal injury, or it might deploy unexpect-
edly and unnecessarily which could result in
an accident and/or injury to you or to oth-
ers.
Page 647 of 801
646 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
DISTRONIC PLUS
Currently Unavailable
See Oper. Manual
DISTRONIC Plus* is switched off and is
temporarily unavailable.
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
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
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.
Wait until the message in the multifunction display disappears.
DISTRONIC PLUS
Inoperative
DISTRONIC Plus* is malfunctioning.
BAS Plus* and PRE-SAFE
® Brake* are also
not available.
Contact an authorized Mercedes-Benz Center as soon as pos-
sible.
Page 656 of 801
655 Practical hints
What to do if …?
Display
Possible cause/consequence
Possible solution
Parking Guidance
Currently Unavailable
See Oper. Manual
Advanced Parking Guidance* is deactivat-
ed because the area around the sensors*
in the front or the rear bumper
(page 620) is dirty.
Clean the front and rear bumper (
page 620).
Advanced Parking Guidance* is deactivat-
ed because the battery voltage is insuffi-
cient.
Have the battery checked by an authorized Mercedes-Benz
Center.
Advanced Parking Guidance* is switched
off because the radar sensor system* is
temporarily inoperative due to electromag-
netic interference near television and radio
transmitter stations, toll stations, speed
measuring systems, etc.
Wait to see if the interference is temporary or do not use Ad-
vanced Parking Guidance*. Try in a location where the inter-
fering transmission might not be present.
Parking Guidance
Canceled
Advanced Parking Guidance* has been
canceled because:
the vehicle is sliding
the bumper became dirty in the area of
the sensors (
page 620)
there has been a malfunction
Use Advanced Parking Guidance* again later.
If the parking space symbol is not shown in the multi-function dis-
play at a speed below 10 mph (16 km/h):
Clean the bumpers (
page 620).
or
Restart the engine.
or
Contact an authorized Mercedes-Benz Center.
Page 658 of 801
657 Practical hints
What to do if …?
Display
Possible cause/consequence
Possible solution
Shift to P or N
to Start Engine
You have attempted to start the engine
while the automatic transmission was set to
reverse gearR or drive positionD.
Shift the automatic transmission to park positionP or neutral
positionN (
page 426).
Tire Pressure Monitor
Inoperative
The Advanced TPMS or a wheel sensor is
malfunctioning.
Have the Advanced TPMS checked by an authorized
Mercedes-Benz Center.
Warning!
G
Do not drive with a flat tire. A flat tire affects
the ability to steer or brake the vehicle. You
may lose control of the vehicle. Continued
driving with a flat tire will cause excessive
heat build-up and possibly a fire.
Follow recommended tire inflation pres-
sures.
Do not underinflate tires. Underinflated tires
wear excessively and/or unevenly, adverse-
ly affect handling and fuel economy, and are
more likely to fail from being overheated. Do
not overinflate tires. Overinflated tires can
adversely affect handling and ride comfort,
wear unevenly, increase stopping distance,
and result in sudden deflation (blowout) be-
cause they are more likely to become punc-
tured or damaged by road debris, potholes
etc.
Page 665 of 801
664 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Check
Brake Fluid Level
There is insufficient brake fluid in the reser-
voir.
Risk of accident!
Carefully stop the vehicle in a safe location or
as soon as it is safe to do so.
Engage the electronic parking brake
(page 422).
Contact an authorized Mercedes-Benz Cen-
ter.
Do not add brake fluid! This will not solve the
problem.
(USA only)(Canada only)Warning!
G
Driving with the message “Check Brake Fluid
Level ” displayed can result in an accident.
Have your brake system checked immedi-
ately. Do not add brake fluid before check-
ing the brake system. Overfilling the brake
fluid reservoir can result in spilling brake flu-
id on hot engine parts and the brake fluid
catching fire. You can be seriously burned.
!
If you find that the brake fluid in the brake
fluid reservoir has fallen to the minimum mark or
below, have the brake system checked for brake
pad thickness and leaks.
Page 671 of 801
670 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Parking Brake
See Oper. Manual
When you engage or release the electronic
parking brake, the red indicator lamp for
the electronic parking brake flashes for
approx.10 seconds. Afterward, it goes out
or lights up continuously. The yellow warn-
ing lamp for the electronic parking brake
lights up.
The electronic parking brake is malfunction-
ing or overheated for example due to over-
or undervoltage.
Carefully drive off (
page 422).
Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
In the event of overvoltage or undervoltage:
Remove the cause of the overvoltage or und-
ervoltage, e.g. charge the battery or restart
the engine.
Switch ignition off and back on again, and en-
gage or release electronic parking brake
(page 422).
If the electronic parking brake still cannot be re-
leased:
Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
(Continued on next page)
(USA only)(Canada only)
Page 675 of 801
674 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Inoperative
See Oper. Manual
S 600 and S 65 AMG only:
ESP
® a s w e l l a s P R E - S A F E
® are switched off
due to a malfunction. In addition, the v
and ; (USA only) or 3(Canada only)
warning lamps come on in the instrument
cluster.
Brake force assistance is impaired and is
sustained through an electric substitute
function as long as the engine is running.
The brake system continues to function
normally. You will feel a pulsating effect at
the brake pedal while braking.
BAS Plus* and PRE-SAFE® Brake* are also
not available.
Continue driving with added caution.
Have the system checked at an authorized
Mercedes-Benz Center as soon as possible.
Failure to follow these instructions increases the
risk of an accident.
Page 680 of 801
679 Practical hints
What to do if …?
Display
Possible cause/consequence
Possible solution
Check
Coolant Level
See Oper. Manual
The coolant level is too low.
Add coolant (
page 579).
If you have to add coolant frequently, have
the cooling system checked by an authorized
Mercedes-Benz Center.
Warning!
G
Do not spill antifreeze on hot engine parts.
Antifreeze contains ethylene glycol which
may burn if it comes into contact with hot
engine parts. You could be seriously burned.
!
Do not ignore the low engine coolant level
warning. Extended driving with the message and
symbol displayed may cause serious engine
damage not covered by the Mercedes-Benz Lim-
ited Warranty.
Do not drive without a sufficient amount of cool-
ant in the cooling system. The engine will over-
heat, causing major engine damage.
