The latest generation of compact cars from Volkswagen-Audi Group offered quite some interesting driver’s assistant features.After having Lane Assist camera retrofitted, I came up with an idea of having Adaptive Cruise Control on my MY2013 Golf MK7. ACC system is based on Bosch radar which works thanks to the Doppler Effect and waves reflection.
This tutorial will be based on my VW Golf MK7 with manual gearbox, A5 Front Camera and ORIS OEM trailer control module. It works in speed range of 20 do 210km/h. If you are planning to use it in DSG equipped car you will get also Stop-to-Follow functionality which provides stopping capability and moving after car was stopped.
- Front bumper guard with mount for the radar – 5G0 807 109 H
- Hanger for ACC radar – 5Q0 907 461 A
- ACC radar plug – 4F0 972 708
- Plastic cover for the radar – 5G0 907 225 9B9 – 15,42 zł brutto w ASO
- Radar LRR3 Bosch (up to 210km/h 5Q0 907 541 D, F, H, P or G up to 160km/h).
- You need to check rear ABS sensors – has to be bidirectional WHT003864A
- Workshop with capability of Component Protection removal (probably your dealer can do it)
- Steering wheel dedicated to ACC (it’s also possible just to replace left buttons)
- Harness (it’s easy to do it by yourself, 4 up to 6 wires).
- Car has to be equipped with Gateway High – with Extended Can
Luckly enough Golf MK7 has Cruise Control buttons on the steering wheel. You need to replace left buttons or the whole wheel – depends on the costs:
Few words about radars
During preparation of this article I found out a lot of information noise in this topic across the internet. I’d like to shed some light to make it easy to but proper parts, there are two main types of radars which you can find on MQB platform:
- LRR – Long Range Radar – (up to 250m, up to210km/h) – round shape.
- MRR Gen1 – Middle Range Radar – (up to 160m, up to 160km/h or up to 210km/h in conjunction Lane Assist camera) – flat shape.
- MRR Gen2, Gen3 – Middle Range Radar – modern flat shape radars, capable of Pedestrian protection, predictive ACC, best on market.
LRR radars were mounted on early released Golf MK7 and Skoda Octavia 3 (version G, with software limitation up to 160km/h). This type of a radar is more sensitive and more precise then the MRR but it’s also much more expensive – over 900 euro. Audi A3 is still factory equipped with LRR radar as a premium segment representative. Since the middle 2013 VW started mountingt MRR radars in order to cost cuts (price of a brand new MRR unit is around 400 euros). MRR radars has shorter range and sensitivity, in order to provide 210km/h range they need to be used with A5 Front Camera.
To be more precise, you can find three types of radars:
- Radar LRR – round – has only Component Protection
- Radar MRRPlus – flat – has Component Protection and SWaP/FEC license
- Radar MRREvo – flat – has Component Protection and SWaP/FEC license
Component Protection is fairly easy to unlock. It requires visit to your local dealer with legally bought radar and some small payment (around 50-100 euro in Poland). MRR radars has the SWaP/FEC license mechanism and
it’s fairly impossible to retrofit it in an easy way. are a bit harder to retrofit.
Sum up: If you are on budget, you should buy round LRR radar. I was using 5Q0 907 541 P on my Golf MK7.
If you want best functionality, go for MRREvo Gen3.
I found some misleading information on the internet, that you need to somehow hack or modify firmware/bootloader of the radar in order to install it on your device. It’s absolute lie, the only thing is Component Protection and proper coding.
You need to change the front bumper amplifier! If you’ll buy used radar it will be factory calibrated on a car. In order to keep this calibration you have to mount in in the same exact position (there is a margin of 0.08* degree). Price of amplifier with radar mount is almost the same as regular one, you can still sell the old one and get the money back.
You will need to remove the bumper in order to change the amplifier. There are 4 screws on each side, 2 screws holding the grill from the top and 7 screws on the bottom. Fell free to check some bumper removal video available on YouTube for example this one.
Amplifier is mounted using 8 screws and 4 screws (2 on each side) which are attached to the intercooler. You don’t need to remove headlight to do it.
Harness should be prepared based on the diagram:
Pin 1 – Ground
Pin 2 – Can Extended HIGH
Pin 3 – Can Extended LOW
Pin 4 – empty
Pin 5 – Camera A5 – Lane Assist – Can HIGH – Pin 7
Pin 6 – Camera A5 – Lane Assist – Can LOW – Pin 1
Pin 7 – empty
Pin 8 – +12V Terminal 15 – from the cabin fuse box
Length of the cables should be measured on the car. Two of the cables to the Can Extendes should be routed to TIUL coupling point, additional pair of can cables sould go from the radar to the A5 Front Camera (if you have one).
It’s REALLY important to use power from fuse box in the cabin not the engine bay! At the beginning I’ve used the fuse box in the engine bay and I’ve felt in constant loop of errors. I wasn’t able to start the system as module 13- ACC Radar was constantly getting error code – radar separated. Probably the current is delivered with a small delay.
01 – Engine
149 – Check Coding of ECUs on Powertrain Data Bus
P1647 00  – –
13 – Auto Dist. Reg
1043 — Automatic Distance Control
B10E7 F0  — Disconnected
After successful radar installation you need to do the coding – using VCDS, ODIS or VCP. It’s good to follow XaGiCo Dossier guide, I’ll provide few of my own comments :
- 01 – Engine
– for manual gearbox you need to tick ACC – PR-8T5
– for DSG gearbox you need to set ACC with Front Assist (PR-8T3, PR-8T8)
- 03 – ABS (coding for 29 bit) you ned to edit bit 24:
– for manual gearbox you need set: 14 (or 16)
– for manual gearbox and Lane Assist you need to set F4
– for DSG gearbox you need to set F8
- 09 – Gateway
– Add 13 – Auto Dist. Reg on the installation list
– Under Adaptation change steering wheel type to ACC
- 17 – Instrument
– On the cluster set all the ticks for Front Assist and Distance Regulation
- 5F – Radio
– Set all the ticks for Front Assist, ACC and PreCrash
- A5 – Front Camera
– Set presence of ACC
The last module that need to be coded is the Radar itself. Here is my coding for the unit:
Address 13: Auto Dist. Reg (J428) Labels:| 5Q0-907-567.clb
Part No SW: 5Q0 907 567 P HW: 5Q0 907 567 P
Component: ACC3 H10 0100
Clear all the DTC error and start using your newly equipped Adaptive Cruise Control.
May thanks to guys Trust2k, downtime and Eldar for all the help and knowledge.