Diesel Particle Filter (DPF): Service and Repair
Particulate Filter with NOx Reduction Catalytic Converter Overview
Special tools, testers and auxiliary items required
• Hose Clip Pliers (VAS 6362)
1 Exhaust Pressure Sensor 2 (G451)
• Bolted near the oil filler neck.
2 Heat Shield
• Replace if damaged
3 Bolt
• 8 Nm
4 Bolt
• 4 Nm
5 Control Line
• Ensure the line is seated securely.
• From the Exhaust Gas Circulation (EGR) housing.
6 Bolt
• 10 Nm
7 Shield
• Note the installed position.
8 Heated Oxygen Sensor (HO2S) (G39)
• 52 Nm
• Use the ring spanner 7-piece set (3337) to loosen and tighten.
• Lubricate the threads with hot bolt paste (G 052 112 A3) only, do not let the hot bolt paste (G 052 112 A3) get into the slots on the oxygen sensor body.
9 Seal
• Always replace
10 Clamp
• 7 Nm
• Always replace
• Note the installed position, refer to => [ Clamps and Exhaust Gas Temperature Sensor, Installed Position ] Clamps and Exhaust Gas Temperature Sensor, Installed Position.
11 from the Turbocharger
12 Exhaust Gas Temperature (EGT) Sensor 4 (G648)
• 45 Nm
• Mark the installed position before removing.
• Coat only the threads with hot bolt paste (G 052 112 A3).
• Wire, routing. refer to => [ Exhaust System Component Wire Routing ] Exhaust System Component Wire Routing.
13 Seal
• Always replace
• Installing, refer to => [ Installing the Seal Between the Exhaust
Door Control Unit and NOx Reduction Catalytic Converter ] Exhaust Door Control Unit (J883) and Reduction Catalytic Converter Overview.
14 Clamp
• 7 Nm
• Always replace
• Note the installed position, refer to => [ Installed Position of the Clamp between
the Exhaust Door Control Unit and NOx Reduction Catalytic Converter ] Exhaust Door Control Unit (J883) and Reduction Catalytic Converter Overview.
15 to the Exhaust Door Control Unit (J883)
16 Oxygen Sensor (O2S) After Three Way Catalytic Converter (TWC) (G130)
• 52 Nm
• Use the ring spanner 7-piece set (3337) to loosen and tighten.
• Lubricate the threads with hot bolt paste (G 052 112 A3) only, do not let the hot bolt paste (G 052 112 A3) get into the slots on the oxygen sensor body.
• Wire, routing. Refer to => [ Exhaust System Component Wire Routing ] Exhaust System Component Wire Routing.
17 NOx Reduction Catalytic Converter
• Unit with particulate filter - item 27 - (cannot be separated).
The decoupling elements between the particulate filter and NOx reduction catalytic converter can be damaged. When removing and installing:
• Do not bend the decoupling element more than 10°.
• Do not stretch the decoupling element.
• Do not damage the wire mesh on the decoupling element.
• Use the transportation lock (T10404) to secure the unlocking element from overbending.
• Removing and installing, refer to => [ Particulate Filter with NOx Reduction Catalytic Converter ] Service and Repair.
18 Bolt
• 25 Nm
19 Suspended Mount
• Install without tension.
20 from the Exhaust Gas Recirculation (EGR) Filter
21 Clamp
• 3.5 Nm
• Always replace
• Note the installed position, refer to => [ Clamps and Exhaust Gas Temperature Sensor, Installed Position ] Clamps and Exhaust Gas Temperature Sensor, Installed Position.
22 Exhaust Gas Temperature (EGT) Sensor 2 (G448)
• 45 Nm
• Note the installed position, refer to => [ Clamps and Exhaust Gas Temperature Sensor, Installed Position ] Clamps and Exhaust Gas Temperature Sensor, Installed Position.
• Coat only the threads with hot bolt paste (G 052 112 A3).
23 Exhaust Gas Temperature (EGT) Sensor 3 (G495)
• 45 Nm
• Note the installed position, refer to => [ Clamps and Exhaust Gas Temperature Sensor, Installed Position ] Clamps and Exhaust Gas Temperature Sensor, Installed Position.
• Coat only the threads with hot bolt paste (G 052 112 A3).
24 Nut
• 23 Nm
25 Nut
• 23 Nm
26 Bracket
• Note the installed position.
• For the particulate filter.
• Fastened to the cylinder block.
• Install without tension.
27 Particulate Filter
• Unit with NOx reduction catalytic converter - item 17 - (cannot be separated).
The decoupling elements between the particulate filter and NOx reduction catalytic converter can be damaged. When removing and installing:
• Do not bend the decoupling element more than 10°.
• Do not stretch the decoupling element.
• Do not damage the wire mesh on the decoupling element.
• Use the transportation lock (T10404) to secure the unlocking element from overbending.
• Removing and installing, refer to => [ Particulate Filter with NOx Reduction Catalytic Converter ] Service and Repair.
• After replacing, set the soot load measurement adaptation to "0". Refer to "Guided Functions" in the vehicle diagnostic tester.
28 Control Line
• 45 Nm
• Do not change the angles of the control line.
• Install without tension.
29 Bolt
• 9 Nm
30 Bracket
• For the control line.
• Install without tension.
31 Bracket
• Note the installed position.
• For the particulate filter.
• Fastened to the cylinder head.
• Install without tension.
32 Bolt
• 23 Nm
33 Exhaust Pressure Sensor 1 (G450)
• Bolted to the auxiliary fuel pump (V393) bracket.