MQB tow bar retrofit
Supported cars
- Audi A3 (8V) MK3
- Audi Q2
- Seat Leon (5F) MK3
- Skoda Octavia (5E) MK3
- Skoda Superb
- VW Golf (5G) MK7
- VW Passat (3G) B8
- VW Arteon
Hardware
TODOoo
Wiring
TODOoo
Coding & Adaptation
Add module to Gateway
0x19 → InstallationList → add module 0x69 (Trailer Hitch module)
Now you can check if the trailer module is available
0x69 → Coding
Adjust tow bar module coding
TODOoo
Let rest of the car know about new feature
Let's start with Engine Control Module
Notice: actual Byte/Bit address depends on the engine that you have in your car
0x01 → LongCoding → Byte 5 → Bit 4 (Trailer Recognition installed) //TODO: other configs for other engines
Now ABS/ESP
0x03 → 1 → 7 → installed
Body Control Module
Notice: around 2016/17 BCM does not use LongCoding anymore. It will be filled with 00s.
0x09 → LongCoding → Byte 1 → Bit 1 (Trailer Hitch Control Module installed) 0x09 → Adaptation → Vernetzung → anhaengeranschlussgeraet → installed
Parking sensors. This will tell the module that it should expect trailer behind the car - not an obstacle.
0x10 or 0x76 → LongCoding → Byte 3 → Bit 0-1 (Trailer Hitch installed - manually removable)
Adaptive Cruise Control
0x13 → LongCoding → Control Module for Towing → installed
Instrument Cluster also needs to know about the trailer.
0x17 → LongCoding → TODOoo
Since you are dragging something behind your car, blind spot sensors will see it permanently. Let them know about it.
0x3C → Long Coding → TODOoo
Rear View Camera should start in the Trailer Mode if the trailer is connected.
0x6C → Long Coding → TODOoo
Electric trunk door? Let's let it know that there might be an obstacle behind the car
0x6D → Long Coding → Trailer → installed
Multifunction camera also needs to know about the tow bar and trailer. For one, the camera will be pointing slightly higher when trailer is connected. And if you have Traffic Sing Assist or Traffic Sign Recognition it will also show you trailer-related signs.
0xA5 → Long Coding → TODOoo