Mercedes-Benz OM 904-926 LA BlueTec Operating Instructions Manual page 22

Exterior view
20
®
BlueTec sensors, overview OM 926 LA
Valve preheating, AdBlue
:
Silencer
;
Temperature and humidity sensor (air filter, clean air side)
=
Metering unit
?
Temperature sensor downstream of catalytic converter
A
NOx sensor
B
Temperature sensor upstream of catalytic converter
C
SCR frame module
D
Supply unit
E
®
AdBlue /DEF filter
F
®
AdBlue /DEF tank
G
®
/DEF system