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Hi, I have a similar problem. I apologize for my bad English.
My car is e90 320D 2005y. with ordinary leather seats. I bought seat from 335D electric with memory and heating.
The driver seat work correctly with K Can-H & K Can-L, without encoding anything,but the passenger is operated by A4010a.
I saw the diagram here from the forum, I put the cables from A4010a pin 38 to X279 C4 and 12v / 5A from X11003 to X279 C3.
I think everything is connected properly, but the seat is not heated and the button does not turn green.
Am I wrong somewhere? Or it must be encoded. I'm asking for help what coding is needed, in general how to warm this seat.
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