Page 601 of 723
598 Practical hints
What to do if …?
Display Possible cause/consequencePossible solution
Service
See Oper. ManualCL 600:
The brake system sensors are malfunction-
ing. The brake system continues to function
normally with full brake force boost.Continue driving with added caution.
Have the system checked at an authorized
Mercedes-Benz Center as soon as possible.
(USA only)
(Canada only)
Brake wearThe brake pads have reached their wear
limit.Have the brake pads replaced as soon as
possible.
!Brake pad thickness must be visually
checked by a qualified technician at the intervals
specified in the Maintenance Booklet.
ProCarManuals.com
Page 602 of 723
599 Practical hints
What to do if …?
Display Possible cause/consequencePossible solution
Parking brake
See Oper. ManualThe red indicator lamp for the electronic
parking brake is either on or off and the yel-
low warning lamp for the electronic parking
brake comes on.
The electronic parking brake is
malfunctioning.To release:
Pull handle of electronic parking brake
(
page 384).
or
Drive off carefully (page 384).
Contact an authorized Mercedes-Benz
Center as soon as possible.
or
Release electronic parking brake mechani-
cally (
page 637).
Contact an authorized Mercedes-Benz
Center as soon as possible.
To engage:
Switch off ignition and press handle for elec-
tronic parking brake until the warning mes-
sage on the multifunction display disappears.
(USA only)
(Canada only)
ProCarManuals.com
Page 603 of 723
600 Practical hints
What to do if …?
Display Possible cause/consequencePossible solution
Parking brake
See Oper. ManualThe red indicator lamp for the electronic
parking brake flashes.
The power supply for the electronic parking
brake was malfunctioning or the electronic
parking brake was previously mechanically
released.Pull handle for electronic parking brake
(
page 384).
or
Carefully drive off (page 384).
or
Press handle for electronic parking brake un-
til the warning message disappears from the
multifunction display.
(USA only)
(Canada only)
ProCarManuals.com
Page 604 of 723
601 Practical hints
What to do if …?
Display Possible cause/consequencePossible solution
Parking brake
See Oper. ManualThe red indicator lamp for the electronic
parking brake flashes and the yellow warn-
ing lamp for the electronic parking brake
comes on.
The electronic parking brake is
malfunctioning.Switch ignition off and back on again, and en-
gage or release electronic parking brake
(
page 384).
or
Carefully drive off (page 384).
Contact an authorized Mercedes-Benz
Center as soon as possible.
or
Release electronic parking brake mechani-
cally (
page 637).
Contact an authorized Mercedes-Benz
Center as soon as possible.
(USA only)
(Canada only)
ProCarManuals.com
Page 605 of 723

602 Practical hints
What to do if …?
Display Possible cause/consequencePossible solution
Parking brake
See Oper. ManualWhen 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 comes on continuously. The yellow warn-
ing lamp for the electronic parking brake
comes on.
The electronic parking brake is malfunction-
ing or overheated for example due to over-
or undervoltage.Carefully drive off (page 384).
Contact an authorized Mercedes-Benz
Center 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 384).
If the electronic parking brake still cannot be re-
leased:
Release electronic parking brake mechani-
cally (
page 637).
Contact an authorized Mercedes-Benz
Center as soon as possible.
(Continued on next page)
(USA only)
(Canada only)
ProCarManuals.com
Page 606 of 723

603 Practical hints
What to do if …?
Display Possible cause/consequencePossible solution
Parking brake
See Oper. ManualIf overheated:
Let vehicle cool down, and do not engage
electronic parking brake during this time.
or
Switch ignition off and back on again, and en-
gage or release electronic parking brake.
(USA only)
(Canada only)Parking brake
inoperativeWhen you engage or release the electronic
parking brake, the red indicator lamp for
the electronic parking brake flashes and
goes out after approx. 10 seconds. The yel-
low warning lamp for the electronic parking
brake comes on.
The electronic parking brake is
malfunctioning.Switch ignition off and back on again, and en-
gage electronic parking brake (
page 384).
If the electronic parking brake cannot be en-
gaged:
Shift the automatic transmission to P
(
page 389).
Protect vehicle from rolling away while
parked by using a chock from the vehicle tool
kit (
page 634).
Contact an authorized Mercedes-Benz
Center as soon as possible.
ProCarManuals.com
Page 607 of 723

604 Practical hints
What to do if …?
Display Possible cause/consequencePossible solution
Please release
parking brakeThe red indicator lamp for the electronic
parking brake flashes and you also hear a
warning signal.
You are driving with the electronic parking
brake activated, or you are carrying out an
emergency brake application with the elec-
tronic parking brake (
page 384).
Release electronic parking brake.
or
Carefully drive off (page 384).
or
Release the handle for electronic parking
brake.
(USA only)
(Canada only)Please release
parking brakeThe red indicator lamp for the electronic
parking brake flashes and the yellow warn-
ing lamp for the electronic parking brake
comes on. You also hear a warning tone.
The electronic parking brake is malfunction-
ing; braking action is restricted.While driving:
Release the handle for electronic parking
brake.
While at a standstill:
Switch off ignition and press handle for elec-
tronic parking brake until the warning mes-
sage disappears from the multifunction
display.
ProCarManuals.com
Page 608 of 723
605 Practical hints
What to do if …?
Display Possible cause/consequencePossible solution
Turn on the ignition
to release the
parking brakeThe yellow indicator lamp for the electronic
parking brake comes on.
You have tried to release the electronic
parking brake, but the ignition was not
switched on.Switch on the ignition (page 336).
(USA only)
(Canada only)
Inoperative
See Oper. ManualESP® as well as PRE-SAFE® are switched off
due to a malfunction. In addition, the v
warning lamp in the instrument cluster
comes on.
The ABS may not be operational.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.
ProCarManuals.com