Secure the harness (22) with a cable ties
(arrows), as shown.
i
A 002 997 24 90 64 (1x)
A 007 997 56 90 (2x)

NOx sensor control unit. Torque to:
9 Nm / 6.6 ft·lb

38

a

Emissions Campaign 2020060001

Installation of Upstream NOx Sensor
i
The work steps 40 to 44 must only be carried out if
the NOx sensor control unit upstream of the SCR
catalytic converter (23) was installed at locationB.

40

B

Install new NOx sensor
upstream of SCR catalytic
converter (3).
i
A 000 905 81 11
(included in package
A 651 905 11 00 85)
NOx sensor upstream of SCR
catalytic converter: Torque to
60 Nm / 44.3 ft·lb

41

Install the NOx sensor control
unit upstream of the SCR
catalytic converter (23) on the
frame.
i
Use new nut fasteners (46):
N 000000 003477
NOx sensor control unit:
Torque to 9 Nm / 6.6 ft·lb

42

Connect the electrical plug
connection (24).
i
Push the gray retaining tab
(24.1) in the direction of the
arrow to lock.

43

Secure the harness (22) with
cable ties. (arrows B)
i
A 007 997 56 90 (2x)

44

Bend the heat shield (47) back into old
position and install a new clamping nut (48).
A 000 994 32 11
i
To do this, place the clamping nut (48)
centrally on the pin, as shown, and slide up
to the stop using a socket wrench.

39

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Emissions Campaign 2020060001

Installation of Downstream NOx Sensor
i
The work steps 45 to 52 must always be carried out

45

Install new NOx sensor control unit
downstream of the SCR catalytic
converter (27).

47

i
Push the gray locking piece (29) in the
direction of the arrow to lock.

i
A 000 905 80 11 80 (included in
package A 651 905 11 00 85)
Use new nut fasteners:
N 000000 003477
NOx sensor control unit: Torque to
9 Nm / 6.6 ft·lb

46

Install the new NOx sensor
downstream of the SCR catalytic
converter (5) on the new SCR catalytic
converter.

Connect and lock the electrical plug
connection (30).

48

Secure harness (32) with cable tie (31).
i
A 007 997 56 90 (1x)
p
Do not route the harness (32) under tension.
Otherwise damage could occur.

i
NOx sensor downstream of catalytic
converter: Torque to 60 Nm / 44.3 ft·lb

40

a

49

Emissions Campaign 2020060001

Install the heat shield (25).
i
To do this, place the new
clamping nuts (26) centrally
on the pin, as shown, and
slide up to the stop using a
socket wrench.
i
A 000 994 32 11

50

Install the new mounting tab (34) on the heat shield (25).
i
A 220 546 18 43

51

Clip the harness (32) into the mounting tab (34).
p
Do not kink the harness (32) and make sure it is not routed
so as to be abraded.
This prevents damage.
p
The harness (32) must not touch heat shield (25).
This prevents damage.
i
The layout schematic of the harness (32) has changed on
account of the changed position of the NOx sensor
downstream of the SCR catalytic converter (4).

52

Lift:
Lower the vehicle.
Ramps:
Vehicle may remain on ramps

41

a

Emissions Campaign 2020060001

Execution of the AEM Special Procedure
53

Connect the battery charger to the
vehicle's jump posts as indicated.
(arrows)
p
A sufficient power supply to the
vehicle on-board system must be
ensured throughout the entire work
procedure.
Otherwise any undervoltage that
occurs may damage the control
units.
i
Do not connect the battery charger to
the auxiliary battery in the engine
compartment.
i
Follow the operating instructions for
the battery charger.
i
Use a Mercedes-Benz recommended
battery charger to ensure an
adequate voltage supply (min. 12.5 V)
is provided for the on-board electrical
system battery.

42

a

54

Emissions Campaign 2020060001

Connect the diagnostic system.
i
The diagnostic system remains connected to the vehicle
throughout the work procedure!
Do not disconnect the diagnostic system’s online connection.

55
56
57

Switch on the ignition.
Start the diagnostic system.
Run XENTRY and start special procedure of
customer service measure.
i
To do this, select the following menu items: Control
unit view → N3/33 - Motor electronics 'CDI43' for
combustion engine 'OM651' (CDI) (Code: MH5|MH8)
→ Special procedures→ Service measure "Exhaust
gas after-treatment"
i
The process starts automatically after
starting the special procedure.
The operation steps must be
performed exactly as per the diagnostic system.

A result report is displayed at the end of the
special procedure. Upload this report to
paperless pXD. The report must indicate “OK” for
all items. Otherwise, the procedure must be
repeated. The vehicle can only be returned to the
customer after successfully completing the
special procedure.
i
Parts of the procedure via the diagnostic system
are shown on the following pages.

If a fault arises during the special procedure, repeat
the procedure. If the fault persists, create a PTSS
case or XSF-ticket including the following:
•Initial Quick test
•Current Quick test
•Control unit log
•AEM Result Report
•Support Packag

43

a

Emissions Campaign 2020060001

First

Second
Third

44

a

Emissions Campaign 2020060001

wait

45

a

Emissions Campaign 2020060001

46

a

Emissions Campaign 2020060001

wait

47

a

Emissions Campaign 2020060001

First

Second

Caution page is for information only, and can be ignored when performing the AEM.
Select 'Continue' to proceed with the AEM Service Measure.

48

a

Emissions Campaign 2020060001

First
Second

Third

49

a

Emissions Campaign 2020060001

Make sure it’s unchecked

50

a

Emissions Campaign 2020060001

Caution page is for information only, and can be ignored when performing the AEM.
Select 'Continue' to proceed with the AEM Service Measure.

Service Measure
is NOT Complete!

This is NOT the final results page.
Select 'Continue' to proceed with the AEM Service Measure.

51

a

58

Emissions Campaign 2020060001

Complete the information on the
APPROVED EMISSION
MODIFICATION LABEL and attach it to
the hood near the hood lock.
p
The attachment areas must be entirely
free from dust and grease.
Otherwise, adequate adhesion cannot
be ensured.
i
Fill in Emission Modification Program
No., your dealer code, the date of the
repair and mark the components that
have been installed or modified. Use a
black ultra fine point permanent marker.
i
A 000 584 00 14

Failure to comply may result in dealer
debit and/or possible fines.

52

a

Emissions Campaign 2020060001

Verify completed
successfully

53

a

Emissions Campaign 2020060001

First
Second

Name file:
AEM Results
Third

Fifth
Fourth

54

a

Emissions Campaign 2020060001

Final Quick Test

59

Perform a final quick test and upload to paperless pXD.
i
Faults stored in the memorymust be deleted from the
fault memory after completing the work.
i
If faults are current and stored in the updated control
modules they need to be addressed. If technical
hardships occur create a PTSS caVH

The procedure via the diagnostic system is shown on
the following pages.

55

a

Emissions Campaign 2020060001

56

a

Emissions Campaign 2020060001

wait

57

a

Emissions Campaign 2020060001

Second
First

Name file: 47
Third
Fourth

58

a

60

Emissions Campaign 2020060001

End the XENTRY session

59

a

Emissions Campaign 2020060001

61

Switch off the ignition.

62

'LVFRQQHFWWKHGLDJQRVLVV\VWHP

63

'LVFRQQHFWWKHEDWWHU\FKDUJHU

64

Close the hood.

65

Connect any aftermarket devices that
were connected to the X11/4 diagnostic
socket before.

66

Ramps:
Remove wheel chocks, release parking
brake, and drive the vehicle off the
ramps.
p
Drive the vehicle slowly and at a
constant speed off the ramps.
Otherwise the vehicle may be
damaged.

60

a

Emissions Campaign 2020060001

Replacement parts 2020060001
Part No.

Designation

Quantity

A 651 905 11 00 85

NOx Sensor Package

1

N 000000 003477

Nut Fastener

4

A 000 994 32 11

Lock Pin

4

A 000 584 00 14

APPROVED EMISSION MODIFICATION LABEL
(ULEV III 250)

1

A 220 546 18 43

Mounting Tab

1

A 002 997 24 90 64

Cable Tie Without Clip

1

A 007 997 56 90

Cable Tie With Clip

3

61