ACV LFB Audi 52 Pin Quadlock

If you want to replace your factory radio with an aftermarket radio, you should keep the original steering wheel remote control functions.

However, depending on the vehicle equipment and the range of functions and software of the retrofit device, individual operating functions may be omitted or replaced by other functions.

Compare the adapter plugs shown with those in your vehicle and make sure they fit visually and technically.

Please also check whether one of the specified original factory radios was installed in your vehicle.

Before final assembly, you should check the vehicle functions, vehicle settings and steering wheel remote control to ensure they are working properly.

• Connection: 52 Pin Quadlock VAG connector
• Vehicles with Concert OEM device with color monitor dashboard / 1 x SD card
• Vehicles with AUX input
• vehicles without OEM navigation
• Vehicles without BOSE OEM sound system
• Vehicles without OEM device 2 x SD card
• Vehicle settings not supported



• Audi A1 (8X) 07/2010 - 04/2018
• Audi Q3 (8U) 10/2011 - 06/2018

• Reimported vehicles or vehicles with different software may be functionally incompatible.
• red: +12V ignition terminal 15
• orange: +12V lighting terminal 58
• purple/white: +12V reverse signal
• pink: speed signal
• green: ground GND handbrake signal
• Total output load capacity: 100 mA max.

• 1 relay coil resistance 75 Ohm min.
• 2 relays  Coil resistance 150 Ohm min.
• steering wheel remote control
• *Vehicles with LG Anatel L169SK2 OEM device
• **Vehicles with OEM device including CD drive
• ***Vehicles without Composition Audio MIB Entry OEM device with front AUX/SD/USB
• ***Vehicles with Composition Audio MIB Entry OEM device with front AUX/SD/USB > Article: 42a-1324-001
• ****Vehicles without OEM sound system                    

• LFB cable 42s/acv > Alpine jack: 42ctalpinelead
• LFB cable 42s/acv > Parrot 4 Pin: 42ctasteroidlead
• LFB cable 42s/acv > Bosch-Blaupunkt  >2010 Mini ISO: 42ctblaupunktlead
• LFB cable 42s/acv > Blaupunkt/China HU/Kenwood 3 cable: 42ctchinahulead
• LFB cable 42s/acv > Clarion jack: 42ctclarionlead
• LFB cable 42s/acv > Garmin Vieo" RV52 Stereo Dock 3 cable: 42ctgarminlead
• LFB cable 42s/acv > JVC 1 cable/jack: 42ctjvclead
• LFB cable 42s/acv > Kenwood 1 cable: 42ctkenwoodlead
• LFB cable 42s/acv > Multilead various devices: 42ctmultilead
• LFB cable 42s/acv > Multilead various devices/Pioneer 2022>: 42ctmultilead3
• LFB cable 42s/acv > Multilead various devices/Pioneer 2022>: 42ctmultilead5
• LFB cable 42s/acv > Panasonic 1 cable: 42ctpanasoniclead
• LFB cable 42s/acv > Blaupunkt/Kenwood/Pioneer jack: 42ctpioneerlead
• LFB cable 42s/acv > Pioneer AVH/DMH/SPH 2022> Jack loose: 42ctpioneerlead2
• LFB cable 42s/acv > Devices with LFB learning function: 42ctsmartlead
• LFB cable 42s/acv > Blaupunkt/Kenwood/Sony jack: 42ctsonylead
• LFB cable 42s/acv > XZent/Zenec 1 cable: 42ctzeneclead

• 1: Checking all operating functions and vehicle setting functions of the OEM device
• 2: Disassemble the OEM device without applying any voltage
• 3: Check all interface connections for correctness and continuity without voltage

• 1: Make settings and hardware configuration of the interface without power
• 2: Check the configuration of the radio connection cable
• 3: Connect the radio connection cable according to the operating instructions of the retrofit device
• 4: Connect all other connections according to the operating instructions of the retrofit device
• 5: Connection of the entire installation to the vehicle with the live connection last
• 6: Software configuration of the interface according to the instructions in the article text and in the BDA
• 7: Configuration of the retrofit device according to the operating instructions of the retrofit device steering wheel remote control/camera/FSE/antenna phantom power and others
• 8: Functional test of steering wheel remote control and vehicle

• 1: Make changes without stress
• 2: Connection after change see above 5 to 8

• 1: Revert to the OEM device
• 2: Operating the OEM device
• 3: Establish CAN bus rest
• 4: Checking the hardware configuration of the interface
• 5:  Connection to  CAN bus rest  see above 5 to 8
• Connections, connection changes, alternative connections, connections of loose cables or connection extensions of loose cables specified in the information text or the operating instructions are intended solely for orientation and information purposes for trained specialist personnel.

• 1: Connections and modifications must only be carried out by trained personnel
• 2: Connections and modifications must be checked before connection for any manufacturer approvals or manufacturer warranty conditions that may be affected by the modifications
• 3: Connections and changes must be checked for functionality and correctness before connection by measuring and comparing them with the vehicle's cable assignment plan
• 4: Connections and modifications are carried out at your own risk without guarantee of functionality
• 5: Connections and modifications are carried out at your own risk without any guarantee for damage to the vehicle, the retrofit device or the interface
• 6: Modifications to the pre-assembled wiring harness may void the product warranty