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Discussion Starter · #1 ·
I would like to retrofit AAC to my MY2017 X260.

From what I found I will need:

  • Radar unit
  • Radar mounting bracket
  • Grill for cars with ACC
  • Steering wheel right button panel with distance buttons.
  • CCF modification
Someone mentioned a different ABS unit, but my car is equipped with AEB, so it can brake automatically already (?)...

Am I missing something?
 

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There are two different part numbers for the ABS modulator. One with ACC/ queue assist and one without, it’s the module attached to the ABS pump that is different.
 

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Discussion Starter · #3 ·
So it may not be as easy as it looked initially...

On the other hand I wonder what is the real difference between both versions. At the end of the day both can apply brakes on another unit request...
 

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I think AEB doesn't apply the brakes but preloads a pressure vessel to help apply the brakes more quickly when it senses you take your foot off the accelerator quicker than normal.
 

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Discussion Starter · #6 ·
I think AEB doesn't apply the brakes but preloads a pressure vessel to help apply the brakes more quickly when it senses you take your foot off the accelerator quicker than normal.
The manual says:
If the vehicle AEB detects an imminent risk of collision with a vehicle travelling in front, it automatically applies the brakes .

I think it is the EMERGENCY BRAKE ASSIST (EBA) wchich preload a pressure vessel.

It is quite hard to find 2016-> XF with Active Cruise Control... Or it is my impression only ?
 
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The manual says:
If the vehicle AEB detects an imminent risk of collision with a vehicle travelling in front, it automatically applies the brakes .

I think it is the EMERGENCY BRAKE ASSIST (EBA) wchich preload a pressure vessel.

It is quite hard to find 2016-> XF with Active Cruise Control... Or it is my impression only ?
Any car coming with ACC from factory has it. If you’re interested I can share part number for ACC abs modules.
I also found this in workshop manual. HCU is ABS module.
Electronic Brake Prefill (all diesel and V6 petrol vehicles and all other vehicles with ACC)
Electronic brake prefill (Bosch ESP®plus8.1), senses any rapid throttle lift off, activating a small brake hydraulic pressure build-up of approximately 3 to 5 bar (43.5 to 72.5 lbf/in2) in anticipation of the brakes being applied.
This application produces a quicker brake pedal response and consequently slightly shorter stopping distances. The system supports vehicles with ACC (adaptive cruise control).
When the ABS module detects rapid throttle lift off (from the signals received from the ECM over the high speed CAN bus), it controls the HCU to apply a low brake pressure to assist in a quicker brake application.
 

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Common ABS module has ...A* at the end of WERS no. ACC ABS module has ...B*. Also, abs from 18MY and newer are not compatible with old ones.
 

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Common ABS module has ...A* at the end of WERS no. ACC ABS module has ...B*. Also, abs from 18MY and newer are not compatible with old ones.
Are you on about the letter on the module in this position?

186917
186918


The modulator with a B is the correct one?
 

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Installed acc to my 17my x260 today. All works fine. Parts used:
Abs module: hx73-14f447-b*
Steering wheel switch: t4n13360
Radar bracket: T2H29787
Radar: gx73-9g768-a*
Radar cover (black): C2d35916
Radiator grille (gloss black/chrome): T2H3987
 

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Good to see that it can be done!

Really difficult to get that ABS modulator 2nd hand, it’s £1400 new!

I’d love to do this retrofit, but I added up the cost of the parts and it’s looking at £2500 if the ABS modulator is bought new.
 

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Good to see that it can be done!

Really difficult to get that ABS modulator 2nd hand, it’s £1400 new!

I’d love to do this retrofit, but I added up the cost of the parts and it’s looking at £2500 if the ABS modulator is bought new.
i purchaised second hand abs unit on ebay for £100 from poland.
 
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Discussion Starter · #20 ·
Onotole, is there any cross-reference table between the T2Hxxxx and i.e. GX73-xxxxx numbers ?
The Jaguar WIS references only to T2Hxxx type numbers.
 
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