Mercedes-Benz 2005 M-Class Operator's Manual page 261

Problem
{
The yellow ETS malfunction indi-
cator lamp comes on while the
4-ETS/ESP warning lamp v
flashes.
ê
The yellow LOW RANGE indicator
lamp flashes after one or more
switching conditions.
ê
The yellow LOW RANGE indicator
lamp flashes after switching the
ignition on.
The yellow fuel tank reserve
warning lamp comes on while
driving.
The yellow fuel tank reserve
warning lamp flashes when leav-
ing the engine running.
Possible cause
4-ETS has switched off to prevent overheat-
ing of the brakes. Also see 4-ETS/ESP warn-
ing lamp ( page 258).
4-ETS is malfunctioning and has switched off.
The gear selection conditions have not been
adhered to.
LOW RANGE mode is malfunctioning.
The fuel level has gone below the reserve
mark.
The fuel cap is not closed tightly.
Practical hints
What to do if ...
Suggested solution
As soon as the brakes have cooled off,
4-ETS switches on again.
The indicator lamp goes out.
Have the 4-ETS checked at an autho-
rized Mercedes-Benz Light Truck Cen-
ter as soon as possible.
Repeat the gear selection process
( page 127).
Have the LOW RANGE mode checked at
an authorized Mercedes-Benz Light Truck
Center.
Refuel at the next gas station
( page 219).
Check the fuel cap ( page 219).
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