Position seal (18) in tank cap (10) as shown and reassemble following the removal procedure in the reverse sequence.

In particular tighten the screws (17) to a torque of 3 nm +/- 10% (sect. 3 - 3, Frame torque settings).

Removal of the fuel tank filler cap
Replacing the tank flange and fuel sensorDisplay background colour (automatic adjustment)
Instrument panel background colour is set automatically
according to exterior lighting conditions.
When sensor detects "poor lighting" (night), it switches to
black background mode; vice versa when a "significant"
lighting is detected (day), it switches to white background
...
Engine speed-timing sensor
Introduction
The engine control system of the diavel is equipped with an inductive sensor
that allows the ecu to determine the speed
and timing phase of the engine. The sensor faces a phonic wheel with 48 teeth
minus 2.
The engine speed-timing sensor is an inductive sensor and faces a 48 ...
Refitting the timing belts
Rotate the pulleys on the timing belt driveshaft until the timing mark on the
outer roller is aligned with the mark on the
clutch-side crankcase cover.
In this condition, the horizontal cylinder piston will be at top dead centre.
Install in the alternator cover seat the tool code 88713.20 ...