I added a diode, everything was okey, i didnt pay much attention but there is a small issue on the passenger door. Since on the passenger door, when the door is closed, there is 9v across brown/white (door microswitch wire) to the positive wire.. And the relay is making constant buzzing noise.. I noticed it today, relays are in good condition, i even switched them to have some pice of mind, but its buzzing constantly when passenger doors are closed.. Best thing is i guess, is to wire it up like factory way, then it will also cut off power to the lights after 10min

You probably have broken solder joints within the passenger door lock module, causing an unreliable earth connection.

The thing is, even this guy mentions it in his video https://youtu.be/Z3bb-LCJSZY?t=960 that voltage drops from 12v to 9v, even in rear doors. I dont think we both menage to break solder joints in all 4 doors. Idk, i guess that is a Polo thing. On driver door it drops from 12v to 2v.

If all locks are factory original I could very easily believe that all had various degrees of bad solder joints.

Well could be, but still i dont know how would that cause only partially switch to "switch", then again, even i that video on the drivers door it drops way below 9v when door is closed same as its on mine. On mine, and on his from the video, same values on same doors, so i doubt bad solder joints are an issue here, not saying its not, but 2 cars with exact same thing doesnt seem plausible to me. + reading the comments in that video, there are atleast 2 more people mentioning the same thing

Wire it like factory, if you really need these lights.

Yeah, i belive that would be the best way of doing it, even if both will come on at the same time, if its ment to be like that, its ment to be like that