Zlatko580

I tried that way already, still have "Source signature could not be verified". That is it, your is even older then mine. I read a lot of people with MU 8190 couldn't update their firmware to 8755. And as I know there is no public available any firmware for our units...

Sent in private message.

I also have problem with "Source signature could not be verified". My unit have MU 8190 because of that I asked @jarowals which MU he have. @Tdawber Please can you send me your walkthrough?

Is your current version MU 8190?

You messed something, which is why I wrote a disclaimer in my first post. I don't know of any way to remove CP on these units other than using ODIS with online access. You could try writing the original dump to see if that helps..

There is something wrong, it must be readable with a clamp. I did over 10, every time with clamp. Even same train version as yours. Maybe faulty ch341a... Did you tried with 1.8v adapter?

I don't think you can reverse firmware with factory reset. I did unlocked same train version without desoldering, with a clamp.... Can you explain me, why you need to desolder eeprom?

What is your train and mu version?

I have exactly same unit in my car, so you can read post #1 in this thread, and follow up tutorial. Yes you have to remove radio and disasembly it. CH341A is tool for you, first try with 1.8v adapter if not work, try without it.

It should work. But take extra caution when doing it. You cannot mess anything a lot if you follow up tutorial, even if patch doesn't work, you can write original .bin and return to default state. It will be very helpful if we get feedback from you, did you succeeded. Also if you need additional help write me in pm, I will give you my number.

That backup was before I activated developer menu.

Yes I am, but I don't have option to change color under HMI Look and Feel, as you can see in first post.

Well how this guy did it then? https://www.youtube.com/watch?v=mNUeu3GJDOI Also here... https://www.drive2.ru/l/543886347014766736/ It is all set exactly. adpmap-5F-5E0-035-871-C_TMBAM7NE3J0057395-20250920-1224.CSV

I already have color light, as you can see here: https://www.youtube.com/watch?v=U86_TLvWndg I'm surprised how little information's are known for this type of MMI, as I think there is plenty of them on the market. Is it possible that no one have any idea about this questions? Link to any firmware which could work with train MEN2_EU_SKGPx_P7021L MU: 8190, HW: 612? How to disable signature check on firmware update? Or any other way how to update firmware on this unit?

Well, your admap is more/less same as mine, except you have BCM HIGH so you have wider color pallet. Anyway adaptation channels not have any option releated to MMI, there is options for configuring different ambient light equipment such as VC, door strips, speakers, central console, dashboard etc. I believe MMI is automatically on when you activate Ambient lights menu and color palette. Is your train version MEN2_EU_SEGPx_7021L and MU version 8190 or newer?

Hi, thank you for admap, i started to analyze differences between my and your, but didn't find enough time in past couple days. I will update thread when analyze and test. Also do you have color instrument cluster, and do you have SWING or something else?

@Cairus What coding do I need? Please send me.

Watch this.

There is a lot to say about coding, i personally used this resources: VAG CodingOctavia 3 (5E) Facelift - Ambient Light Activation (color...Purpose: to activate the Ambient Light option on your MIB for changing screen and Virtual Cockpit colors (depending on your MIB version, you may not be able to activate all 30 colors, but only 10). CoКодирование автомобилей VAG - Кодирование зон освещенияОсновные кодировки и адаптации платформ концерна VAG. Прошивки и параметрии. SWaP кодыhttps://vwcoding-ru.translate.goog/MQB/esteticLightsCodingRGB/?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=ajax,nv,elem,se https://www.glaskugelservice.de/codierung/ambientbeleuchtung https://www.drive2.ru/l/663326844895891900/ https://www.drive2.ru/l/663230912506365858/ Also did my resarch which is in attachment. adpmap-09-5Q0-937-084-CD_TMBAM7NE3J0057395-20251006-1722.xlsx

Hello everyone, here I am again with one retrofit which partially did. I have idea of installing footwell, optic ambient tubes in door trims and dashboard trims. For now only footwell is installed. Initially I wanted to fully complete and then write but I got stuck at one problem so I need HELP. I bought cheapest set of four footwell lights which support LIN for around 35€ at AliExpress, And because my BCM doesn't have C29 pin (which you must have for LIN communication) I also bought LIN decoder for around 30€. Wiring is pretty simple and well explained on available tutorials over internet. You basically connecting + from footwell to SC8 7,5A fuse, ground to grounding point and LIN to C29 on BCM. But if you don't have C29 pin on BCM then you need to buy decoder (or replace BCM) which + also going to SC8 7,5A fuse, ground to grounding point, and LIN output to LIN input on the footwell. Next step is coding, which I did with ODIS (VCDS also fine), you can follow up any of tutorials, there is at least 3-4. This is how it looks: https://www.youtube.com/watch?v=U86_TLvWndg PROBLEM: My swing MMI doesn't support color themes for itself. I can change color and intensity of footwell light but light on swing doesn't change. I believe problem is in obsolete and buggy firmware MEN2_EU_SKGPx_P7021L with MU 8190, which I can't update to only available firmware which is MEN2_EU_SKGPx_P0080L with MU 8755 because I always get error like a, signature source couldn't be verified. Here you can see that under Engineering menu>HMI Look and Feel>Runtime color switch you can change manually color. https://www.drive2.ru/l/543886347014766736/ My unit doesn't have that option at all. I searched whole internet on different languages and cannot find solution how to update firmware to MU 8755 or at least any other firmware. I will be very thankful for anyone who can send me any firmware which could work for my unit, or point me how to disable signature check or avoid it with some other way.

Just follow what is written already. https://mib-helper.com/im-so-xory/ There is couple steps...

It should work with or without 1.8 adapter, you can try both options. If it still dosent read, then you need to unsolder chip or at least unsolder vcc leg.

Maybe yes, maybe no. What is your MU version?

Hi, did you try with 1.8v adapter?

It is releated with something about Component Protection. Probably there is possibility something could go wrong, you need to update software and with that VCRN (Vehicle Component Registered Number) you can turn off CP I guess. Not sure about that. Also there is stated that if you can not read it with clamp, you have to unsolder chip, or at least unsolder VCC leg. It is possible that other people who had problems with reading with clamp had MU version which start with 0 🤔