Service

Technical Information

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WJ25

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WJ25 - Retrofitting Connect Functions (Workshop Campaign)

Important:

CRITICAL WARNING - This campaign includes steps where control unit(s) in the vehicle will be
programmed with the PIWIS Tester. The vehicle voltage must be maintained between 13.5 volts and 14.5
volts during this programming. Failure to maintain this voltage could result in damaged control unit(s).
Damage caused by inadequate voltage during programming is not a warrantable defect. The technician
must verify the actual vehicle voltage in the PIWIS Tester before starting the campaign and also document
the actual voltage on the repair order.

Model Year:

2018

Vehicle Type:

718 (982)

Subject:

Mirrorlink/CarPlay

Information:

Vehicles with missing Connect functions were produced due to an allocation error during
production.
As a result, the Connect functions are not available in these vehicles.

Remedial
Action:

Retrofit Mirrorlink and Apple® CarPlay-compatible USB interface.
To do this, the following work is required:
•
•
•
•
•
•
•
•

Installing USB connection in the center console
Routing USB line to the center console
Installing USB/AUX connection in the glove box
Routing USB line to the glove box
Installing USB control unit
Routing lines to the USB control unit
Enabling Mirrorlink/CarPlay
Adapting vehicle order

The following additional work is required for vehicles without navigation system:
•
•
•
Affected
Vehicles:

Installing GPS antenna
Routing GPS antenna line
Replacing steering-column switch

Only the vehicles assigned to the campaign (see also PIWIS Vehicle information). This campaign affects 1
vehicle in Puerto Rico.

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Required parts and materials
Information
Tequipment instructions are also available for retrofitting Apple® CarPlay as described here. The part
numbers listed below may differ from the part numbers provided in these instructions. However, the part
numbers listed here must be used for this campaign.
Parts Info:

Please note: Since only 1 vehicle affected, all required parts will be shipped directly to
respective dealership.
Part No.

Designation
– Use

Qty.

00004399044

 Retrofit kit for Apple® CarPlay

1 ea.

Includes:
98204490005

Power supply wire harness with five socket contacts 1 ea.

9P1979002

Connecting line
– USB interface to connection point in center
console

1 ea.

9P4979022

Connecting line
– USB/iPod control unit to PCM

1 ea.

9P1979018

Connecting line
– USB/iPod control unit to connection point in
center console

1 ea.

9P1979004

Connecting line
– USB/iPod control unit to glove box

1 ea.

9A764295300

USB/iPod control unit

1 ea.

9A764222200

Multimedia interface
– Glove box

1 ea.

9P1035222

USB interface
– Centre console

1 ea.

9P1035925A

USB/iPod control unit holder

1 ea.

N 0209044

Tie-wrap (not shown)

15 ea.

95560683800

Tie-wrap with plug-in socket (not shown)

5 ea.

Also required for vehicles without Navigation system (I-no. 7Q0) and without Voice control
(QH0):
9A703550401

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 GPS antenna

AfterSales

1 ea.

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Technical Information

131/18 ENU

9P4979005

 GPS antenna line

1 ea.

99951307640

 Tie-wrap

10 ea.

95560683800

 Tie-wrap with fixing clips

5 ea.

99950719540

 Expanding spring, 10.7 x 26.4

1 ea.

N 90799102

 Screw, M18 x 1.5 x 18

1 ea.

...

Steering-column switch (see scope)

1 ea.

WJ25

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Information
The steering-column switch to be used for the respective vehicle depends on the following equipment
variants:
•

Mirrorlink/CarPlay

•

Voice control

•

Cruise control and distance control

•

Rear wiper

•

Headlight cleaning system

•

Multi-function operation and heated steering wheel

Due to the large number of equipment-dependent variants of the steering-column switch, equipmentspecific scopes have been defined for retrofitting Mirrorlink/CarPlay. Every vehicle is clearly assigned
just one scope.
To find out which scope is assigned to the vehicle for retrofitting Mirrorlink/CarPlay, see PIWIS
vehicle information.
The part number of the steering-column switch required for the respective vehicle is specified in the
assigned scope.
You will find a list of the scopes under  Technical Information 'Warranty processing'.
Overview:

Overview of the retrofit kit for Apple® CarPlay

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–
–
–
–
–
–
–
–
–

Retrofit kit for Apple® CarPlay
Power supply wire harness
Connecting line (USB interface to connection point in center console)
Connecting line (USB/iPod control unit to PCM)
Connecting line (USB/iPod control unit to connection point in center console)
Connecting line (USB/iPod control unit to glove box)
USB/iPod control unit
Multimedia interface (glove box)
USB interface (center console)
USB/iPod control unit holder

Required tools
Tools:

General tools:
•

Torque wrench, 2 – 10 Nm (1.5 – 7.5 ftlb.), e.g. V.A.G 1783 - Torque wrench, 2-10 Nm (1.5-7.5
ftlb.)

•

Torque wrench, 6 – 50 Nm (4.5 – 37 ftlb.), e.g. V.A.G 1331 - Torque wrench, 6-50 Nm (4.5-37
ftlb.)
Puller VAS 6935 - Puller
Plastic assembly wedge (commercially available)
9900 - PIWIS Tester 3
Battery Charger/Power Supply - Suitable for AGM Type batteries, recommended current rating of
90A fixed voltage 13.5V to 14.5V.

•
•
•
•

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Technical Information

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WJ25

9

Retrofitting Apple® CarPlay interface
Information
Unlike the Tequipment retrofit solution, the retrofit solution listed here does not need a license key
for Apple® CarPlay. After installing the hardware, CarPlay is enabled by restoring the system without
entering a license key. For more information, see the description below.
Work Procedure: 1

Retrofit Mirrorlink/CarPlay.
To do this, see the following instructions up to and including Step 6:  Installation and Conversion
Instructions 'Apple® CarPlay interface'.
Then, adapt the vehicle order and enable Apple® CarPlay.

2

See warning notes and information on control unit diagnosis  Workshop Manual 'Basic instructions
and procedure for control unit programming using the PIWIS Tester'.

3

Switch on the ignition using the original driver's key. To do this, replace the control unit in the
ignition lock with the original driver’s key.

4

Connect the PIWIS Tester to the vehicle communication module (VCI) via the USB cable. Then
connect the communication module to the vehicle and switch on the PIWIS Tester.

5

On the PIWIS Tester start screen, call up the 'Diagnostics' application.
The vehicle type is then read out, the diagnostic application starts and the control unit selection
screen is populated.

6

In the control unit selection screen ('Overview' menu), press •F7“ to call up the 'Additional menu'.

7

When the question “Create Vehicle Analysis Log (VAL)?” appears, either press •F12“ ('Yes') to
create a VAL or press •F11“ ('No') if you do not want to create a VAL.

8

If necessary, press •F12“ ('Next') to acknowledge the message that appears informing you that
campaigns for the vehicle are stored in the PIWIS information system.

9

Adapt vehicle order.

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9.1

Select 'Maintenance of vehicle data'
and press •F12“ ('Next') to confirm your
selection  Maintenance of vehicle data.

9.2

Press •F12“ ('Next') to skip the displays
containing information about vehicle
description, colors/materials and X numbers.

Maintenance of vehicle data
Changing vehicle data - 9WT
9.3

Delete the coding value '9WC – WITHOUT RSE/WITHOUT MIRRORLINK' from the vehicle
data in the M numbers display. To do this, click on the tick in the "Installed" field for the
relevant coding value to deselect the value.
Make sure that the 'Installed' column is no longer ticked for 9WC and that the pen symbol
appears in the 'Changed' column .

9.4

Add the coding value '9WT - MIRRORLINK (CARPLAY)' to the vehicle data. To do this, click
on the tick in the "Installed" field for the relevant coding value to select the value.
Make sure that the 'Installed' column is ticked and that the pen symbol appears in the
'Changed' column .
Changing vehicle data - UI2

9.5

Delete the coding value 'UI4 – EL. INTERFACE, AUX-IN + USB/IPOD' from the vehicle data
in the M numbers display. To do this, click on the tick in the "Installed" field for the relevant
coding value to deselect the value.
Make sure that the 'Installed' column is no longer ticked for UI4 and that the pen symbol
appears in the 'Changed' column .

9.6

Add the coding value 'UI2 – 2 EL. INTERFACE, USB/IPOD' to the vehicle data. To do this,