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463 Practical hints
What to do if ...
5
6
The red brake system indicator
lamp is lit while the engine is run-
ning.
A signal also sounds.
WARNING
G
There is insufficient brake fluid in the fluid res-
ervoir.
\1Also observe the messages in the dis-
play on vehicles with steering wheel
buttons (\2page 489).
\1Do not add brake fluid under any cir-
cumstances. This will not solve the
problem.
\1Do not drive any further.
\1Consult an authorized Sprinter Dealer.
Problem
Possible cause / result
Suggested solutions
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464 Practical hintsWhat to do if ...
5
6
When towing a trailer:
The red brake system indicator
lamp is lit while the engine is run-
ning.
A signal also sounds.
WAR NING
G
The trailer's brake booster is malfunctioning.
The vehicle's driving and braking characteris-
tics may change. There is a risk of the trailer
overbraking.
\1Also observe the messages in the dis-
play on vehicles with steering wheel
buttons (\2page 489).
\1S t o p y o u r v e h i c l e a s s o o n a s i t i s s a f e t o
do so.
\1Do not drive any further.
\1Consult an authorized Sprinter Dealer.
Problem
Possible cause / result
Suggested solutions
nf_BA.book Page 464 Friday, January 25, 2008 3:53 PM
Page 467 of 666

465 Practical hints
What to do if ...
5
Problem
Possible cause / result
Suggested solutions
k The yellow ASR / BAS indica-
tor lamp is lit while the en-
gine is running.
WARNING
G
ASR has been deactivated due to a malfunction.
The engine power output may then be lower.
\1Continue driving, but with even greater
care.
\1Have the system checked at an autho-
rized Sprinter Dealer as soon as possi-
ble.
WARNING
G
BAS has been deactivated due to a malfunction.
The brake system continues to function with the nor-
mal braking effect but with no electronic support.
\1Continue driving, but with even greater
care.
\1Have the system checked at an autho-
rized Sprinter Dealer as soon as possi-
ble.
ASR and BAS have been switched off due to under-
voltage.
The battery may not be being charged.
The brake system is still available with the normal
braking effect.
\1Continue driving, but with even greater
care.
\1Have the system checked at an autho-
rized Sprinter Dealer as soon as possi-
ble.
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466 Practical hintsWhat to do if ...
5
-
The yellow ABS indicator
lamp is lit while the engine is
running.
WA RNING
G
ABS has been deactivated due to a malfunction.
ESP
®, ASR and BAS as well as cruise control have
also been deactivated as a result.
The brake system continues to function with the nor-
mal braking effect but with no electronic support.
The wheels could therefore lock up, for example if
the brakes are applied with maximum force.
\1Also observe the messages in the dis-
play on vehicles with steering wheel
buttons (\2page 489).
\1Continue driving, but with even greater
care.
\1Have the system checked at an autho-
rized Sprinter Dealer as soon as possi-
ble.
WA RNING
G
ABS is temporarily unavailable.
Self diagnosis may not have been completed yet.
The brake system is still available with the normal
braking effect.
\1Drive on for a distance of more than
13 mph (20 km / h).
ABS is available again if the message
goes out.
Problem
Possible cause / result
Suggested solutions
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Page 469 of 666
467 Practical hints
What to do if ...
5
ABS has been deactivated due to undervoltage.
The battery may not be being charged.
The brake system continues to function with the nor-
mal braking effect but with no electronic support.
The wheels could therefore lock up, for example if
the brakes are applied with maximum force.
\1Continue driving, but with even greater
care.
\1Have the system checked at an autho-
rized Sprinter Dealer as soon as possi-
ble.
Problem
Possible cause / result
Suggested solutions
nf_BA.book Page 467 Friday, January 25, 2008 3:53 PM
Page 470 of 666
468 Practical hintsWhat to do if ...
5
#
The yellow ESP
® indicator
lamp is lit while the engine is
running.
WA RNING
G
ESP
® has been deactivated due to a malfunction.
Cruise control is also switched off as a result.
Vehicle stability is no longer automatically controlled
in good time.
Engine power output may be reduced.
\1Also observe the messages in the dis-
play on vehicles with steering wheel
buttons (\2page 489).
\1Continue driving, but with even greater
care.
\1Have the system checked at an autho-
rized Sprinter Dealer as soon as possi-
ble.
ESP
® has been deactivated due to undervoltage.
The battery may not be being charged.
Vehicle stability is no longer automatically controlled
in good time.
Engine power output may be reduced.
\1Continue driving, but with even greater
care.
\1Have the system checked at an autho-
rized Sprinter Dealer as soon as possi-
ble.
Problem
Possible cause / result
Suggested solutions
nf_BA.book Page 468 Friday, January 25, 2008 3:53 PM
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469 Practical hints
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5
1
The red SRS warning lamp
does not go out after ap-
proximately 4 seconds after
the ignition system is
switched on or lights up
again.
WARNING
G
The restraint systems have malfunctioned. The air-
bags or emergency tensioning retractors could be
triggered unintentionally, or not at all in the event of
an accident.
\1Drive on with even greater care to an
authorized Sprinter Dealer.
#
The red battery charge
warning lamp lights up while
the engine is running.
WARNING
G
The battery is not being charged. Possible causes:
\4malfunctioning alternator
\4torn poly-V-belt
\1Stop immediately and check the poly-V-
belt.
If it is torn:
\1Do not drive any further. Consult
the nearest authorized Sprinter
Dealer.
If it is not damaged:
\1Have your vehicle checked at an au-
thorized Sprinter Dealer.
Problem
Possible cause / result
Suggested solutions
nf_BA.book Page 469 Friday, January 25, 2008 3:53 PM
Page 472 of 666
470 Practical hintsWhat to do if ...
5
The battery is malfunctioning.
\1Stop your vehicle as soon as it is safe to
do so.
\1Do not drive any further.
\1Contact a breakdown service, an autho-
rized Sprinter Dealer.
2
The yellow brake pad wear
indicator lamp lights up after
the engine is started or
while the vehicle is in mo-
tion.
WA RNING
G
The brake pads / linings have reached their wear lim-
it.
\1Have the brake pads / linings replaced
as soon as possible at an authorized
Sprinter Dealer.
Problem
Possible cause / result
Suggested solutions
nf_BA.book Page 470 Friday, January 25, 2008 3:53 PM