Mercedes-Benz Atego Manual page 47

Automatic transmission indicator lamp
Risk of accident and injury
The operational safety of your vehicle may be impaired if service work is not carried out properly. There is a
risk that you could lose control of the vehicle and cause an accident. Also the safety systems may not protect
you or others as they are supposed to.
Always have service work performed at a qualified specialist workshop possessing the required expertise and
tools in order to perform the necessary work.
Mercedes-Benz recommends a Mercedes-Benz service center for this work.
In particular, it is absolutely essential that all safety-relevant work and all work on safety-relevant systems is
performed by a qualified specialist workshop.
Problem
The indicator
7
lamp in the
instrument panel
lights up.
The display shows
AGN .
Possible cause/con- Suggested solutions
sequence
If the indicator lamp
7
is constantly lit,
the transmission oil
temperature in the
automatic
transmission is too
high.
The automatic A specialist workshop may be able to help you continue
transmission has a your journey with certain limitations if you give them the
malfunction. fault code.
To display the fault code:
To exit the fault code:
Guidelines for Breakdown Services (Subject to technical modifications)
Switch off retarder.
Stop the vehicle as soon as possible taking into account
the traffic situation.
Apply parking brake and shift automatic transmission to
neutral.
Run engine at a speed of 1200 – 1500 rpm for 2 – 3 min-
utes and then switch off engine.
If the transmission oil temperature does not drop, check
transmission oil level, see page 50.
If the fault reoccurs, contact a qualified specialist work-
shop.
Press the automatic transmission buttons
k
simultaneously twice.
The display shows the number of the fault code, e.g. D1,
and then a 5-digit fault code, e.g. P 25 11, in
succession.
Press the MODE button to display the next fault code. A
maximum of 5 fault codes can be stored.
Press the automatic transmission buttons
k
simultaneously or select any gear button.
Instrument panel
G
j
and
j
and
i
45