Page 315 of 442
315 Practical hints
What to do if …
Problem
Possible cause
Suggested solution
l
The red DTR warning lamp
comes on while driving.
You are too close to the vehicle in front of you
to maintain selected speed.
Apply the brakes immediately to in-
crease the following distance.
l
The red DTR warning lamp
comes on while driving and you
hear a warning sound.
You are gaining too rapidly on the vehicle
ahead of you.
The distance warning system has recog-
nized a stationary obstacle on your prob-
able line of travel.
Apply the brakes immediately.
Carefully observe the traffic situation.
You may need to brake or maneuver
to avoid hitting an obstacle.
W
The yellow fuel tank reserve
warning lamp comes on while
driving.
The fuel level has gone below the reserve
mark.
Refuel at the next gas station
(page 278).
<
The red seat belt warning lamp
flashes for a brief period after
starting the engine.
The warning lamp reminds you to fasten seat
belts.
Fasten your seat belt.
Page 316 of 442
316 Practical hintsWhat to do if …Problem
Possible cause
Suggested solution
1
The red SRS indicator lamp
comes on while driving.
There is a malfunction in the restraint sys-
tems. The airbags or emergency tensioning
devices (ETDs) could deploy unexpectedly or
fail to activate in an accident.
Drive with added caution to the near-
est authorized Mercedes-Benz Cen-
ter.
Warning!
G
In the event a malfunction of the SRS is indi-
cated as outlined above, the SRS may not be
operational. For your safety, we strongly
recommend that you visit an authorized
Mercedes-Benz Center immediately to have
the system checked; otherwise the SRS may
not be activated when needed in an acci-
dent, which could result in serious or fatal
injury, or it might deploy unexpectedly and
unnecessarily which could also result in an
accident and / or injury to you or to others.
Page 317 of 442
317 Practical hints
What to do if …
Lamp in center consoleProblem
Possible cause
Suggested solution
PASSENGER AIRBAG OFF
The indicator lamp comes on.
A BabySmart
TM child seat is installed on the
front passenger seat. Therefore, the front
passenger airbag is switched off.
The system is malfunctioning when there is
no BabySmartTM child seat installed on the
front passenger seat.
Have the system checked as soon as
possible by an authorized
Mercedes-Benz Center.
PASSENGER AIRBAG OFF
The indicator lamp does not come on with a
BabySmart
TM child seat properly installed
on the front passenger seat.
The system is malfunctioning.
Make sure there is nothing between
seat cushion and child seat and check
installation of the child seat.
If the light remains out, have the sys-
tem checked as soon as possible by
an authorized Mercedes-Benz Center.
Do not use the BabySmart
TM restraint
to transport children on the front pas-
senger seat until the system has been
repaired.
Page 320 of 442
320 Practical hintsWhat to do if …Display
Display message
Possible cause
Possible solution
Battery
Protection
Conven. Functions
Temporarily
Unavailable
The battery has insufficient voltage
and can no longer supply conve-
nience functions such as the rear
window defroster.
As soon as the on-board voltage is sufficient,
the consumers will switch on again.
Please Note:
Conven. Functions
Available Again
On-board voltage is sufficient; the
consumers will switch on again.
Cruise control
Visit workshop!
Cruise control or Distronic* is mal-
functioning.
Have the cruise control or Distronic*
checked by an authorized Mercedes-Benz
Center.
Distronic
External interference
Reactivate!
The Distronic* is switched off and is
temporarily unavailable.
Try activating the Distronic* again later.
Visit workshop!
The Distronic* is malfunctioning or
the display is malfunctioning.
Visit an authorized Mercedes-Benz Center
as soon as possible.
Page 321 of 442
321 Practical hints
What to do if …
Display
Display message
Possible cause
Possible solution
Distronic
Currently unavailable
see oper. manual
DISTRONIC* is switched off if:
the DISTRONIC cover in the area
of the radiator grille is dirty
the functionality is impaired by
heavy rain or thick fog
If necessary, clean the DISTRONIC cover in
the area of the radiator grille.
Restart the vehicle.
or
DISTRONIC* becomes operational again with-
out the engine being restarted when:
dirt on the grille falls off while driving (e.g.
slush or snow)
the system recognizes full sensor availabili-
ty (due to lessening rain or the road surface
drying)
the message in the multifunction display
disappears
the speed last stored flashes in the display
for five seconds.
You can operate DISTRONIC* as usual again.
Page 323 of 442

323 Practical hints
What to do if …
Display
Display message
Possible cause
Possible solution
ESP
not available!
See Operator’s Manual
The ESP is deactivated because of a
malfunction or interrupted power
supply.
The SBC brake system is still func-
tioning normally.
Synchronize the ESP. With the vehicle sta-
tionary, turn the steering wheel completely
to the left and then to the right to synchro-
nize the ESP.
If the ESP message does not go out:
Continue driving with added caution.
Visit an authorized Mercedes-Benz Center
as soon as possible.
Failure to follow these instructions increases
the risk of accident.
P
Gear selector lever in P
You have turned off the engine with
the KEYLESS-GO* start / stop but-
ton* and opened the driver’s door.
Place the gear selector lever in positionP.
P/N
Shift to N or P
You have attempted to start the en-
gine with the KEYLESS-GO*
start/stop button while the gear se-
lector lever was in positionR orD.
Place the gear selector lever in positionP or
N.
Page 328 of 442

328 Practical hintsWhat to do if …Display symbol
Display messages
Possible cause
Possible solution
Except Canada:;Canada only:3
Brake fluid
Visit workshop!
There is insufficient brake fluid in the
reservoir.
Risk of accident! Stop the vehicle and
notify an authorized Mercedes-Benz
Center. Do not add brake fluid! This
will not solve the problem.
Warning!
G
Driving while these messages are displayed
can result in an accident. Have your brake
system checked immediately.
If there is a malfunction in the SBC brake
system, we recommend that the vehicle be
transported with all wheels off the ground
using flatbed or appropriate wheel lift / dolly
equipment.
A tow bar must be used if circumstances do
not permit the use of the recommended
towing methods and the vehicle requires
towing with all four wheels on the ground.
Towing the vehicle with all four wheels on
the ground is only permissible for distances
up to 30 miles (50 km) and at a speed not to
exceed 30 mph (50 km / h). For more infor-
mation, refer to “Towing the vehicle”
(page 381).
If the SBC brake system enters its emergen-
cy operation mode, the driver must apply
significantly greater brake pedal pressure
and depress the pedal much further than
normal to obtain braking effect. If neces-
sary, apply full pressure to the brake pedal.
Brakes may only be applied to the front
wheels. Stopping distance is increased!
Low brake fluid in the reservoir may cause
the braking system to fail!
Don’t add brake fluid before checking the
brake system. Overfilling the brake fluid res-
ervoir can result in spilling brake fluid on hot
engine parts and the brake fluid catching
fire. You can be seriously burned.iIf 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.!Brake pad thickness must be visually
inspected by a qualified technician at
the intervals specified in the Service
Booklet.
Page 332 of 442
332 Practical hintsWhat to do if …Display symbol
Display messages
Possible cause
Possible solution
G
Display malfunction
The instrument cluster display is malfunc-
tioning.
Continue driving with added caution.
Visit an authorized Mercedes-Benz
Center as soon as possible.
Display malfunction
Visit workshop!
The displays for several systems have
malfunctioned. Some systems them-
selves may also have malfunctioned.
Have the electronic systems checked
by an authorized Mercedes-Benz Cen-
ter.
±
Display malfunction
Visit workshop!
Certain electronic systems are unable to
relay information to the control system.
The following systems may have failed:
Coolant temperature display
Tachometer
Cruise control display
Have the electronic systems checked
by an authorized Mercedes-Benz Cen-
ter.
J
Door open
You are attempting to drive with one or
more doors open.
Close the doors.