W221 headlight retrofit with OEM SAM - 2024
If you mean you can read logic boards schematics and tell me what to change I can do that.
I still want use old SAM. Is it possible to have it work with old SAM?
CAN module is discontinued unfortunately so it's not available online. But I can share it's connected and what changes was done inside the SAM:
CAN module work as 'man-in-the-middle' method and it converts CAN signals between SAM and XALWA.




Here, in the EU this solution is named "Chinese solution". If only position/parking lights not working, you can install resistors.
It's far too complicated ( for me ) and of course far beyond any safety. All that is based on the folklore regarding " coding is hard".
Sorry, I can help only if you install the facelift SAM.
Here, in the EU this solution is named "Chinese solution". If only position/parking lights not working, you can install resistors.
It's far too complicated ( for me ) and of course far beyond any safety. All that is based on the folklore regarding " coding is hard".
Sorry, I can help only if you install the facelift SAM.
1. Batteries are different thus different protocols to operate with them: 35Ah vs 95Ah AGM under the hood, 95Ah AGM vs none in the trunk, and none vs ~10Ah in the dashboard).
2. Consumer shutoff doesn't work properly (lamps in the doors and cigarette lighter relays are turn on and off very quickly (like a strobe) instead of shut off.
3. A constant errors about F32k2 quiescent current relay
PS: For parking lights if resistors can solve it why coding can't do that?
Last edited by Plato; Nov 10, 2024 at 06:58 PM.




Quiescent current can be coded as well from battery sensor domain
The resistor is needed on old SAM because there is no option for coding the positions.
1. Batteries are different thus different protocols to operate with them: 35Ah vs 95Ah AGM under the hood, 95Ah AGM vs none in the trunk, and none vs ~10Ah in the dashboard).
2. Consumer shutoff doesn't work properly (lamps in the doors and cigarette lighter relays are turn on and off very quickly (like a strobe) instead of shut off.
3. A constant errors about F32k2 quiescent current relay
PS: For parking lights if resistors can solve it why coding can't do that?
Could you please tell me how exactly it can be coded?
PS (IMPORTANT): If I solve parking lights is it possible to code DLR to work properly? Since old car also had DLR but different type.
Last edited by Plato; Nov 10, 2024 at 07:39 PM.




Two of the will strobe in rear SAM + lights in doors and trunk... I had that with my facelifit SAM
Could you please tell me how exactly it can be coded?
Do you remember what bulb was in 2008 W221 as parking light so I can find a proper resistance to try?
PS (IMPORTANT): If I solve parking lights is it possible to code DLR to work properly? Since old car also had DLR but different type.
I never installed resistors so I can't tell you the values, but any Chinese installer should know.
Under PWM voltage the resistor will be very hot
About coding, is always related to the SW and HW. It's not a universal solution.
If you install facelift SAM, I can show you how to save the coding ( with Vediamo or DTS Monaco software) in such a way to see the variants.
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I never installed resistors so I can't tell you the values, but any Chinese installer should know.
Under PWM voltage the resistor will be very hot
About coding, is always related to the SW and HW. It's not a universal solution.
If you install facelift SAM, I can show you how to save the coding ( with Vediamo or DTS Monaco software) in such a way to see the variants.
But what about those ILS functions what was available in old headlights and those available in new (like adaptive fog light, highway light, etc). Do you mean you can also code it so I don't need my CAN module in fact if I install facelift SAM?




But what about those ILS functions what was available in old headlights and those available in new (like adaptive fog light, highway light, etc). Do you mean you can also code it so I don't need my CAN module in fact if I install facelift SAM?








Only need facelift SAM ( the one with plastic cover) and the wiring accordingly with the facelift schematics, no any adapters needed.
All functions works, ILS, DRL, even the Battery management can be coded.
There are several wires that need to be added and most of them need to be re-routed on SAM side.to have the facelift configuration.
Hello, iam doing conversion, can u share what need to cross in sam front? I got facelift sam f. Best regards




Some knowledge is required to find and especially to understand WIS schematics




Kurvenlicht Substitution
Kurvenlicht Substitution Nebelscheinwerfer
Retriggerzeit Scheinwerferaufschaltung
Ersatzlichtfunktion aktiv




