MK7 Cup Holder ambient light with OEM control

[mr-fix]

Done!
Wired to BCM, coded, separate circuit, adjustable brightness with slider control, independent from other background lights (door, footwell, etc.), coming&leaving home logic.

Parts

• Extra thin LED strip (White 6500K),
• BCM terminal,
• Isolation tape, wires, zip ties, connectors...

Tools

• Diagnostic computer (VCDS, OBDeleven, whatever... ),
• Torx key, flat driver, prying tools, terminal crimping tool cutters, precise knife...

Here's how I done it (in a nutshell)

1. disassemble center console and install LED strip
2. find empty Leuchte BCM channel by checking module 09 adaptation channels
3. wire ground to ground, positive to BCM
4. adjust coding and adaptation values in 09 and 5F
5. enjoy!

Coding and adaptations

1. Making sure that MIB (infotainment unit) is ready for slider controls. If you have door lights or footwell lights you most likely already have this.
   

   Module 5F → Adaptation → Car Function list BAP Gen2 → Interieur light 0x08 → Activated
   Module 5F → Adaptation → Car Function list BAP Gen2 →Interieur light 0x08 msg bus → Comfort data bus
   Module 5F → Adaptation → Car Function adaptatations Gen2 → menu display ambient illum. → activated
   Module 5F → Adaptation → Car Function adaptatations Gen2 →menu display ambient illum. over threshold high → activated

2. Enable slider on the infotainment screen, adjust brightness change calculation parameters
   

   Module 09 → Security Access → 31347
   Module 09 → Long Coding → Byte 17 → bit 2 (Ambient Cupholder Lights) → installed
   Module 09 → Adaptation → Interior light, light configuration → Cockpitbeleuchtung → installed
   Module 09 → Adaptation → Int. light, 2nd generation → Aufloesung dimmzeit → 0.1s
   Module 09 → Adaptation → Int. light, 2nd generation → Helligkeit Cockpitbeleuchtung nicht berechnen → not active

3. Set the LeuchteXX channel (where XX is the channel number that you have selected to use)
   

   Module 09 → Security Access → 31347
   Module 09 → Adaptation → LeuchteXX → Lasttyp → 46 - LED Kleinleistung
   Module 09 → Adaptation → LeuchteXX → Lichtfunktion A → Ambientelicht 2
   Module 09 → Adaptation → LeuchteXX → Dimmwert AB → 100 (%)
   Module 09 → Adaptation → LeuchteXX → Lichtansteuerung HD AB → Always

4. Adjust slider maximum brightness (0x14 = 20 DEC. Maximum here is 0x64=100 which is way to much for it to use it at night)
   

   Module 09 → Security Access → 31347
   Module 09 → Adaptation → Interior lighting, parameter → P adaption kundenwunch cockpit → 14

5. Adjust brightness change delays (set all to 0 for instant reaction)
   

   Module 09 → Security Access → 31347
   Module 09 → Adaptation → Interior lighting, parameter → P t * cockpit → 0 (s)

6. Link one of the events to the slider (126% is magical)
   

   Module 09 → Security Access → 31347
   Module 09 → Adaptation → Interior lighting, parameter → P helligkeit Fzg geschlossen zuendung ein cockpit → 126%

7. Adjust brightness level on all other events (25% is enough for this LED strip but if your is dimmer you can increase this)
   

   Module 09 → Security Access → 31347
   Module 09 → Adaptation → Interior lighting, parameter → P helligkeit * cockpit → change all with default 100% to 25%

Might be useful

• Adding wiring to BCM
  
  
  
• Disassembling center console
  

 

[mr-fix]

Couple pictures

 

[(R)Rated]

Thanks!

 

[(R)Rated]

Do you have any more information you can provide on how you installed the LED strips? I want to do the same, but I want to make sure I do a clean install.

 

[mr-fix]

This might be helpful when it comes to disassembly of the center console:

 

[(R)Rated]

Howdy, I have seen the videos you have posted before and I actually did that modification based on the video you posted above. I am more or less talking about you a close up of how you installed / routed the LED strips themselves.