TOP VEHICLE TECH KWMBZ1 User manual

www.topvehicletech.com
The informaon provided in this document is subject to change without noce due to changes and/or
improvements to the product/s.
V1.0321
KWMBZ1
INSTALLATION MANUAL
This dash image is a visual representaon for display purposes only.
MERCEDES BENZ
 2004-2012
 2005-2011
 2006-2014
 2006-2014

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ABOUT THIS PRODUCT
The KWMBZ1 installaon kit allows for the retenon of the vehicle’s steering wheel controls and helps maintain
the original aesthec of the interior when installing a new car stereo. The KWMBZ1 gives you everything you
need for a complete install in one box. The components of this kit are compable for the following vehicles with
Audio20 factory stereos:
A-Class (W169) 2004 - 2012 B-Class (W245) 2005 - 2011
Viano (W639) 2006 - 2014 Vito (W639) 2006 - 2014
The wiring harness and interface will retain the steering wheel controls and factory phone buons (if vehicle is
equipped). The interface supplied features a Quadlock connector.
CUSTOMER SUPPORT
Installaons should be carried out by, or under the guidance of an experienced installer. If you do encounter any
problems during the installaon of this product, then please contact our dedicated customer service team at:
Phone:  E-Mail: [e-mail]
CONTENTS
• 1x Fascia plate (with accessories)
• 1x Instrucon manual
• 1x Steering wheel control harness and interface
• 1x Antenna adapter
• 1x DAB antenna adapter
• 1x Stereo patch lead

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FITTING GUIDE
1. Open the passenger side door and proceed to pull away the door trim from the pillar.


2. Using a set of panel removal tools, begin to pry away the pillar casing.
4. The DAB antenna not only has a self adhesive backing, but also features a black earth sheet. When
placing the DAB antenna, the earth sheet MUST be placed onto the metal part of the pillar. The antenna
itself must be located roughly 15cm from the top of the windscreen.


5. Once happy with the placement, take the 3m of wiring extension and feed it down through to the
stereo’s opening. With the wiring adjusted to the appropriate length, feel free to re-install the glovebox.
3. The glovebox will need to be dropped down to route the antennas wiring. To do this, remove 3x screws
located underneath, one on the side and the 4x screws inside the lip of the glovebox. Once free, drop
down and leave in the footwell.

1. Use a panel removal tool to release both the climate control and the air vent panelling which surrounds
the main radio.
2. With these panels removed, it will reveal 4x screws that will need to be removed.
3. Once free, pull the head unit out of the dashboard and disconnect all of the wiring in the process.
1. Take the steering wheel control interface in hand and connect both the 12-way stereo patch lead and
the 14-way steering wheel harness connectors to the corresponding sides.

1. Aach the brackets to the new stereo. These brackets allow you to set the specic depth of the unit in
relaon to the fascia plate. Start by lining up the spacerson the inside of the plates
.
  
2. Aach the spacer and plate combinaon to the corresponding side of the stereo using the screws that
come with the stereo. Test this set up outside of the dashboard by sliding into the radio cage.
3. Take the fascia in hand, and place it atop the caged radio combinaon. If the depth/alignment of the
stereo hangs out too much/is reccessed to far, use the radio removal keys to release the stereo
from the cage and repeat the process.
4. When you’re happy with the bracket alignment, you can proceed to install the fascia into the dashboard,
ulising the pre-exisng screws.
2. Connect the bullet connector from the stereo patch lead to the ‘steering wheel remote input’ on the
back of the new stereo.
3. Connect the DAB antenna’s SMB connector to the back of the new stereo.

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Please note: conguraon layout may dier dependent on vehicle model.
FITTING GUIDE
5. Aach the addional wiring on the harness to the back of the stereo:
Pink - Speed Pulse  - Park Brake  - Reverse  - Mute
6. When all the above wires (and any addional accessories) have been connected, nally make the
connecon between the stereo and the vehicles pre-exisng connector.

12
3
4
5
6
7
1. Source
2. Track +
3. Track -
4. Pick Up
5. Hang Up
6. Volume +
7. Volume -
1. Menu Up
2. Arrow Up
3. Arrow Down
4. Pick Up
5. Hang Up
6. Volume +
7. Volume -
 
4. Aach the antenna adapter to the vehicles pre-exisng connecon and the back of new stereo.
 CONT’D.

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WIRING DIAGRAM
ISO Connector
Connect to new stereo
Quadlock Connector
Connect to connector from vehicle
Stereo Patch Lead Connector [12 Pin]
Connect to Interface Box
Note: Must be connected first, before power
connection is made to the interface
Main Wiring Loom Connector [14 Pin]
Connect to Interface Box
Interface Box
Flying Wires
Pink - Speed Pulse
Green - Park Brake
Purple - Reverse Gear
Yellow/Black - Mute
Stereo Patch Lead Bullet Connector
Connect to ‘Steering Wheel Remote Input’ on back
of the stereo.

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If at any point you experience any problems and need any assistance before, during or aer the
installaon process, please contact us via :
Phone: 
E-Mail: [e-mail]
Mon - Fri 9am - 5.30pm GMT

If you would like to download a digital copy of this manual, or any other product, then please
visit the www.topvehicletech.com website.
This manual is considered correct at the me of prinng but is subject to change. For the latest
manuals & updates, refer to our website.
Copyright 2021 by TopVehicleTech.
All rights reserved. No part of this publicaon may be reproduced, distributed or transmied
in any form or by any means, including photocopying, recording, copying or other electronic or
mechanical methods, without the prior wrien permission of the author.