P47.10-2163-11
45 Filler neck
75 Fuel tank
The fuel tank is positioned at the frame floor ahead of the rear axle because of the through-loading facility (from trunk into passenger compartment).
Design
The fuel tank consists of two-layer plastic and is divided into two chambers due to the U-shaped recess clearance. The chambers are connected to each other.
P47.10-2178-06
45 Filler neck
55/2 Fuel filter with fuel pressure regulator
75 Fuel tank
84 Cap
92 Fuel pressure line to the engine
B4/1 Left fuel level sensor
B4/2 Right fuel level sensor
B4/3 Fuel tank pressure sensor
M3 Fuel pump
A Electrical connection
(fuel level sensor, fuel pump)
a Vent line to activated charcoal canister
b Expansion reservoir
c Fuel tank air admission line
d Vent line to fuel tank
P47.10-2164-08
55/2 Fuel filter with fuel pressure regulator
55/2a fuel pressure regulator
88 Fuel delivery module
92 Fuel pressure line to the engine (regulated fuel pressure)
95 Suction jet pump
B Fuel pressure line from fuel pump to fuel filter (uncontrolled fuel pressure)
C Fuel delivery line from suction jet pump to fuel delivery module
D Fuel pressure line for supplying suction jet pump
B4/1 Fuel gage sensor, left half of tank
B4/2 Fuel gage sensor, right half of tank
M3 Fuel pump
A Return flow from fuel pressure regulator to fuel delivery module
Function
The fuel flows from the two-stage fuel pump into the fuel delivery module , out of the right fuel tank chamber, through the fuel pressure line to the fuel filter with fuel pressure regulator into the left fuel tank chamber.
A junction with the fuel pressure line supplies the suction jet pump . A suction effect is produced in the suction jet pump which draws the fuel from the deepest point out of the left fuel tank chamber to the fuel delivery module.
Moreover excess fuel flows from the fuel pressure regulator to the fuel delivery module .
This ensures that the left fuel tank chamber is properly emptied.
The filtered fuel with controlled fuel pressure is supplied to the engine via the fuel pressure line (single-line system).
The housing of the fuel delivery module serves as a swirl pot. While cornering with a low level of fuel in the fuel tank, it prevents the fuel pump from drawing air.
A fuel strainer is installed at the bottom in the fuel delivery module at the feed to the fuel pump.
Each fuel tank chamber has a fuel level indicator sensor. Both resistance values are transmitted separately to the rear SAM control unit with fuse and relay module, which processes the signals accordingly and transmits them to the instrument cluster over the CAN databus.
The fuel tank has no outlet valves. It is drained through the fuel pump via the fuel line in the engine compartment.