[Cniksor]

You need minimum:
CAS + key socket + button
JBBE (in jbbe there are 3 CAN buses, one for obd2, the other for DDE, DSC, EPS, EKP. Third to CAS, KOMBI, CID, ZBE, KLIMA, MRS, FRM, PDC, FZD ...)
If CAS from Europe is still ELV
I also did something trash in a more extended version:
https://www.youtube.com/watch?v=LnVHZ0ImeZA

i was able to find a jbe from 3 series at the junkyard today, from matching car i got all the other parts from, exactly like photo i posted.
i found this pinout on this forums but i think it isnt for jbe but JBR, do you happen to know how to connect the wiring?

so i have:
cas
kombi
key holder / start button
jbe
obd2 port


OBD II
1: Ignition Connector Block (wakeup)
2: not connected
3: Ethernet connection to cic quadlock pin 37 (black plug)
4: Gnd Connector Block
5: Gnd Connector Block
6: K-bus high (pin 17 on blue 54 pin jbr plug, x14271)
7: I have this connected to pin 30 (PA-BUS) of the CAS (not sure if this is correct???
8: Ethernet connection to cic quadlock pin 29 (black plug)
9: F_TD this goes to the DME)
10: not connected
11: Ethernet connection to cic quadlock pin 38 (black plug)
12: Ethernet connection to cic quadlock pin 31 (black plug)
13: Ethernet connection to cic quadlock pin 32 (black plug)
14: K-bus low (pin 33 on blue 54 pin jbr plug, x14271)
15: not connected
16: +12v Batt Connector Block

JBR x14270 ( the long black plug)
Pin 23 <----- GND Connector Block

JBR x14271 (the 54pin blue plug)
JBR x14271 Pin 10 = K-bus low <----> CAS X13376 pin 26 = K-bus low
JBR x14271 Pin 46 = K-bus high <----> CAS X13376 pin 35 = K-bus high

Pin 17 K-bus high <----> OBD Pin 6
Pin 33 K-bus low <----> OBD Pin 14

Pin 45 wakeup <----> (ignition) also connected to Pin 1 OBD

JBR x14272 (the 54pin black plug) to 8 pin CID (black cic display plug)
+12v -----> Power to Controller Pin 1
GND -----> GND to Controller Pin 2
Pin 11 <----> K-bus high CID Pin 3
Pin 30 <----> K-bus low CID Pin 4

Pin 1 -----> Power to CID Pin 1
Pin 27 -----> GND to CID Pin 3
Pin 29 <----> K-bus high CID Pin 5
Pin 31 <----> K-bus low CID Pin 6

JBR x4010 23pin plug (that connected to the fusebox base)
Pin 3 <----- +12v Batt (source) Connector Block
Pin 22 <----- +12v Batt (source) Connector Block

CAS X13376 black 41pin plug
Pin 21 <----- +12v Batt Connector Block
Pin 34 <----- +12v Batt Connector Block

Pin 12 <----> GND Connector Block
Pin 25 <----> GND Connector Block

Pin 8 <----> wakeup (ignition)
Pin 26 <----> K-bus low
Pin 35 <----> K-bus high

ELV
Pin 1 <----> GND Connector Block
Pin 2 <----> CAS EL + pin 23 CAS
Pin 3 <----> CAS EL - pin 24 CAS
Pin 4 <----> CAS PA-bus pin 30 CAS

Kombi
Pin 18 <----- GND Connector Block
Pin 9 <----- Power Connector Block
Pin 7 <----> K-bus low Connector Block
Pin 6 <----> K-bus high Connector Bloc