Def Tank; Fuel/Def Gauge - freightliner BUSINESS CLASS M2 Driver Manual

DPF Regen Needed
1
Hot Exhaust
2
DEF Refill Needed
3
11/30/2010
Freezing Conditions
DEF freezes to slush at around 12°F (-11°C). It is not
damaged or destroyed if frozen, and is fully usable
when thawed. The DEF in the tank is allowed to
freeze while a vehicle is non-operational. At start-up,
normal operation of the vehicle is not inhibited if the
DEF is frozen; an immersion heater with engine cool-
ant flowing through it warms the DEF once the en-
gine is running, allowing the SCR system to operate.
Pre-2013 DEF supply lines are electrically-heated
and are purged when the engine is shut down; com-
plete purging of the DEF lines requires approximately
five minutes after the engine is shut down.
DEF supply lines with engine model year 2013 and
newer are designed to survive freezing conditions
while containing DEF, so purging is not required.
IMPORTANT
Diesel Particulate Filter (DPF)
regeneration is needed.
If flashing, regenerate as soon as
possible. Engine derate possible.
Hot exhaust can cause fire.
Keep flammables and people away
Diesel Exhaust Fluid (DEF) level is
low. Engine derate likely.
DEF
Refill tank with certified DEF.
See operator's manual for complete instructions.
Fig. 7.3, Warning Lamp Decal, Sun Visor
from exhaust.

DEF Tank

Engines that are compliant with EPA10 and newer
regulations are equipped with a DEF tank located on
the driver's side of the vehicle behind the battery box
or forward of the fuel tank. See
The DEF tank has a 19 mm filler neck inlet that pre-
vents the hose from a diesel outlet from being in-
serted, and has a blue cap for easy identification.

Fuel/DEF Gauge

The diesel fuel and DEF levels are measured in a
dual-purpose gauge. See
Fuel level is indicated at the top of the gauge. Below
the fuel level, a low fuel warning lamp illuminates
amber when the fuel level drops below 1/8th of the
capacity.
The lower portion of the gauge has a DEF warning
lamp that illuminates amber when the DEF tank is
near empty, and a lightbar that indicates the level of
Engines
24−01656−000
f080161
Fig. 7.8 and Fig.
Fig. 7.10.
7.9.
7.4