014

V-block

016

Ram

017

Support drift

‑ If possible, always support at rear
Install at longitudinal member (4).
‑ For front support to spring clamp plate
(1). Unscrew support plate (012) at right
and left an equal distance.
‑ In vehicles with vehicle lift support
point at integral carrier (5).
‑ For front support at longitudinal
member (2) and support at front rear
spring bracket (6). Can be used
alternatively to front support to spring
clamp plate (1). Pull out long support
plates (013) at right and left an equal
distance.
‑ In vehicles without a vehicle lift
support point at the integral carrier (5)
in the vicinity of the inner mounts of the
semi-trailing arms.
‑ For rear support at front rear spring
bracket (3) and rear support at
longitudinal member (4). Pull v-block
(014) at right and left rear out an equal
distance.
‑ Vehicles with heavy bodies and panel
vans/crewbuses with a long wheelbase
at the crossmember (7) should be
supported with a prop (016).
‑ With soundproofing Ensure that
support drift (017) does not make
contact with bracket (8) of rear
soundproofing. If necessary, loosen
bracket (8), push towards the front as
far as possible and retighten it.
Otherwise the brackets (8) of the rear
soundproofing and the longitudinal
members may be damaged.
‑ For front support to longitudinal
member (2). Unscrew support drift
(017) at right and left an equal distance.

Secure vehicle on lift.
p
Heavily loaded vehicles, vehicles with a heavy body and
vehicles with unfavorable load distribution must be
secured.
Otherwise these may fall.

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Emissions Campaign 2020040001

Instructions for driving onto ramps
i
When performing procedure on
ramps.
i
Vehicle must be driven onto ramps
before procedure is started, and
may remain on ramps for the
entire procedure.
i
Race Ramps are available for
order from MBUSA Standard
Service Equipment Program
(SSEP): www.mbusassep.com
Part number:
784-RR-HTVR-RC-KIT

i
Read the operating instructions provided by the manufacturer
of the ramps. Since these are ramps that have not been built
or tested by Mercedes Benz, no information can be given on
safety. Mercedes Benz excludes all liability when using these
ramps.
1

Place the vehicle on a clean, firm and
level surface.

3

i
Make sure that there is enough space to
the front.
2

Drive the vehicle onto the ramps until it is
positioned in the end position specified by
the manufacturer of the ramps.
p
Drive the vehicle slowly and at a constant
speed onto the ramps.
Otherwise the vehicle may be damaged.

Place ramps in the middle (arrows A) of
the front wheels.

i
If necessary, include a helper to instruct
you.

i
The ramps must be aligned parallel to
each other.
4

Secure the vehicle against rolling away.
i
For example, by applying the parking
brake and by placing a wheel chock
(arrow B) on the rear wheels.

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Emissions Campaign 2020040001

Initial Quick Test
1
2

Switch off the ignition.
Disconnect Geotab, Omni Track, Navigation
or any aftermarket devices that are connected
to the X11/4 diagnostic socket.

3

Open the hood.

4

Connect the battery charger to the
vehicle's jump posts as indicated.
(arrows)

i
Verify Vehicle Identification Number (VIN)
on vehicle VIN markings matches VIN on
Repair Order exactly. Correct VIN errors
on RO before RO is closed at your
dealership.

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.

22

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Emissions Campaign 2020040001

5

Ensure XENTRY is fully updated with the
latest release and all available add-ons.

6

Connect the diagnostic system. Make sure
that the OBD2 connection cable is
connected directly to the factory X11 / 4
diagnostic socket and not via an adapter
cable.

7

Switch on the ignition.

9

i
Ensure Vehicle Identification Number (VIN)
readout in XENTRY/DAS matches vehicle
VIN markings exactly. If not, please open a
PTSS case with photos of VIN markings and
XENTRY/DAS Quick Test showing VIN
readout.
i
Pre-existing faults causing a Check Engine
Light must be evaluated. Reference PreInspection Notes on page 2.

i
The diagnostic system remains connected to
the vehicle throughout the work procedure!
Do not disconnect the diagnostic system’s
online connection.
8

Run XENTRY and perform Quick Test. Upload
Initial Quick Test print-out to paperless pXD.

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

Start the diagnostic system.
10

Perform Emissions Modification Pre-Inspection.

23

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Emissions Campaign 2020040001

First

Second
Third

24

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Emissions Campaign 2020040001

wait

25

a

Emissions Campaign 2020040001

26

a

Emissions Campaign 2020040001

wait

27

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Emissions Campaign 2020040001

First
Second

Name file:
QT 1
Third
Fourth

i
Pre-existing faults causing a Check Engine Light must be
evaluated. Reference Pre-Inspection Guide on page 2.

28

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Emissions Campaign 2020040001

Pre-Inspection Special Procedure

First

Second

29

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Emissions Campaign 2020040001

i
If on-Compliant alterations are found reference the
Pre-Inspection Guide on page 2 for next steps.

30

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Emissions Campaign 2020040001

End the XENTRY session.

31

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Emissions Campaign 2020040001

12

Switch off the ignition.

13

Disconnect the diagnostic system.

14

Disconnect battery charger.

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Emissions Campaign 2020040001

Replacement of AEM Parts

15

Lift:
Raise the vehicle.
i
A description of the lift points is
available on pages 19-20.
Ramps:
Vehicle may remain on ramps.

16

Spray penetrating oil
on the threads of the
NOx sensor upstream
(3) and downstream
(5) of SCR catalytic
converter, as shown.
p
Exhaust system
should be cold in
order to carry out
the next steps.
This avoids injuries.
i
Observe the wait
period and details
provided by the
manufacturer of the
penetrating oil!

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Emissions Campaign 2020040001

Removal of Upstream NOx Sensor

17

Loosen the heat shield (47).

18

Bend the heat shield (47) down until the NOx
sensor control unit upstream of the SCR catalytic
converter (23) is accessible.

i
This is done by bending up the individual locking
fins with a screwdriver and unscrew the clamping
nut (48) in a counter-clockwise direction with a
screwdriver.

19

Disconnect the electrical plug connection (24)
NOx sensor control unit upstream of the SCR
catalytic converter (23).

i
To do this, unlock the gray retaining tab by moving
in the direction of the arrow.

20

Remove the NOx sensor control unit upstream of
the SCR catalytic converter (23) from the frame.

i
To do this, remove and dispose nuts (46)

21

Remove and dispose the cable ties and retaining
clips (arrows) from harness (22) of the NOx
sensor control unit upstream of the SCR catalytic
converter (23).

22

Remove NOx sensor upstream (3) of the SCR
catalytic converter.

i
Observe state-specific regulations for disposal.

i
The control unit and the NOx sensor upstream
(3) of the SCR catalytic converter are a single
unit.
i
Return the NOx sensor upstream of SCR catalytic
converter (3) to the originating parts department.
23

Clean the threads and the contact surfaces on the
exhaust pipe.

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Emissions Campaign 2020040001

Removal of Downstream NOx Sensor
24

Remove and dispose mounting tab
(34) from harness (32).
i
Observe state-specific regulations
for disposal.

25

Remove and dispose of the
clamping nuts (26).
i
This is done by bending up the
individual locking fins with a
screwdriver and unscrew the
clamping nuts (26) in a counterclockwise direction with a
screwdriver.

26

27

Remove the heat shield (25).

Disconnect the electrical plug connection (30) at the NOx
sensor control unit downstream of the SCR catalytic
converter (27).

i
To do this unlock the gray locking device (29)
by moving in the direction of the arrow.

28

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

29

Remove the NOx sensor downstream of the SCR catalytic
converter (5).

i
To do this, remove and dispose the nuts (28)
and cable tie (31).
i
Observe state-specific regulations for disposal.

i
The control unit and the NOx sensor downstream of the
SCR catalytic converter (5) are a single unit.
i
Return the NOx sensor downstream of the SCR catalytic
converter (5) to the originating parts department.
35

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Emissions Campaign 2020040001

Installation of Upstream NOx Sensor
30

Install new NOx sensor
upstream of SCR catalytic
converter (3).
i