Fuel Supply Line: Service and Repair

AR01.10-D-2400-02S Disconnect/Connect Hose and Line Connections














129 589 00 91 00
Set of stop plugs





1 Unfasten grommet (5) on battery box (6).
2 Remove positive line (3) from battery box (6) and expose up to the starter (M1).
3 Mark fuel hoses (10, 11) relative to the fuel lines (12, 13), disconnect and close off using suitable stop plugs.

Collect escaping fuel in a suitable container.





4 Remove electrical line (16) from oil filler pipe (17).
5 Remove cover (9) from transmission (14).
6 Disconnect electrical connector (18) from transmission (14)





7 Remove lead seal (15).

On vehicles with code (BB3) Electronic stability program.

Installation: Replace lead seal (15).

8 Remove speed sensor (B6/12) from transmission (14) and lay down to side with electrical wiring harness connected

On vehicles with code (BB3) Electronic stability program.

Installation: Observe tightening torques.





9 Disconnect electrical connector (7) from NOx sensor upstream of SCR CAT control unit (A97/1)
10 Remove NOx sensor upstream of SCR CAT control unit (A97/1) from frame.
11 Expose electrical line (4) on NOx sensor upstream of SCR CAT control unit (A97/1) to sensor (1) on frame.
12 Fasten NOx sensor upstream of SCR CAT control unit (A97/1) with electrical line (4) to catalytic converter diesel particulate filter unit (2).





13 Disconnect oxygen sensor connector (B85/2x1 or B85/3x1) and expose electrical line (19) to oxygen sensor.

On engine 642.898 fasten electrical line (32) together with electrical line (19) to engine with cable tie.

14 Remove coolant hose (20) from exhaust gas recirculation, lay upward and fasten with cable tie
15 Remove vacuum hose (21) from aneroid capsule (22).
16 Detach vacuum line (29) at vacuum pump (30).
17 Disconnect pressure hoses (34) on pressure lines (33) from diesel particulate filter differential pressure sensors.

On engine 642.898

Installation: Check clamps, replace if necessary.

18 Open brackets (35), unclip automatic oil lines (36) and fasten to engine with cable tie.





19 Remove ground line (23) on longitudinal member (24).

Installation: The connecting point for ground line (23) on the longitudinal member (24) must be free of paint, dirt or corrosion.

20 Open cable tie and expose engine wiring harness (25) in engine compartment.
21 Disconnect electrical connectors (26, 27).
22 Unlock electrical connector (28) and detach from CDI control unit (N3/20 or N3/30).
23 Fasten engine wiring harness (25) to engine with cable tie.





24 Remove high pressure expansion hose (37) on the power steering pump (38).

Collect hydraulic oil running out in suitable container. Close openings with suitable stop plug.

Installation: Installation: Replace sealing rings. Replace sealing ring. Observe tightening torque of high pressure expansion hose (37).

25 Unscrew bolts (41, 42), remove refrigerant lines (39, 40) from AC compressor (A9) and plug openings with suitable stop plugs.

With code (HH9) Regulated air conditioning (Tempmatic)

Installation: Replace sealing rings. Observe tightening torque for bolts (41, 42).

26 Connect in reverse order.