[viki300]

has some one done this before i just installed and cant get it right i have these parts 71606855719 (Towbar)

71602289552 (Harness)
71606884357 (Control Unit for Trailer Hitch) control unit second hand when installed ista says can not communicate with AHM and it shows red on it esys dont reconise it at all i follow this instruktion only thing which was bit unclear was that addional wire between FEM and rear fuse box that do i need to use it if i have that rear fuse box installed all ready because they are used on FEM and fuse box all ready tryed to code both K235 H word and 3AC to FA and then VO codes those FEM ICS REM HU and Kombi but only warnings on dash and AKH stays red on ista no show on ESYS

[Siki78]

I think you should added 235 SA in FA and not 3AC. Can you see module with esys?

[viki300]

i try that as well but ended same

[Siki78]

If you can`t see module in esys something is wrong on wiring

[viki300]

or second hand unit but yes i check them again

[viki300]

sorted can H and L was wrong position on factory cable after added 235 and VO code all good