Mercedes-Benz 212 Sedan E-Class Service Manual page 54

Fuel tank
As in the predecessor model series, the fuel tank in
model series 212 is located in front of the rear axle
under the rear bench seat in order to provide the
largest possible opening between the trunk and the
passenger compartment when the rear seat backrest
is folded down.
The blown fuel tank is a new development and is made
of high-density polyethylene (HDPE). The complex
shape of the thermoplastic fuel tank has a multiple-
layer wall construction of six layers with a block layer
to prevent hydrocarbon penetration.
The capacity of the fuel tank in the 4-cylinder models
is approx. 59 liters, including a reserve of approx.
8 liters. Fuel tanks with capacities of approx. 66 liters
or approx. 80 liters can be ordered as special equip-
ment.
Fuel tank in E 250 CDI
with OM 651
1 Tank cap
2 Filler neck
3 Breather line
4 Feed line
5 Return line
6 Suction jet pump
7 Tank limiting and
vent valve
B4 / 1 Fuel level indicator sensor,
left
B4 / 2 Fuel level indicator sensor, right
B4 / 7 Fuel pressure sensor
M3 Fuel pump
– This printout will not be recorded by the update service. Status: 01 / 2009 –
In all models, two service holes on the top of the tank
facilitate removal of the pump and the filter unit with
pressure sensor. The expansion volume is inside the
fuel tank. The fuel tank fill level is measured by a dedi-
cated float-and-lever sensor in each chamber. Each
float-and-lever sensor has its own electrical connector
plug.
The fuel filler flap is located in the usual place in the
right fender below the C pillar. The filler neck is welded
directly onto the tank bladder. It opens into the right-
hand chamber of the fuel tank, which is filled first. The
tank cap is tied to the fuel filler flap with a retaining
strap so that it will not be forgotten after refueling.
Introduction of the New E-Class, Model Series 212 Sedan
Fuel system
P47.00-2171-00
b
53