Mercedes-Benz OM 904-926 LA BlueTec Operating Instructions Manual page 18

Exterior view
16
Engine overview OM 906 LA
Filler neck
:
Stop button
;
Start button
=
Air compressor
?
Power-steering pump
A
Engine control (MR) control unit
B
Oil dipstick
C
Refrigerant compressor
D
Tensioning pulley
E
Fuel filter
F
Coolant pump
G
Fuel prefilter
H
Coolant outlet to the radiator
I