[dncomputech]

That's strange. Is any error stored?
You can try to flash the szl

I have no errors in Isata +.
The HBA button also works well (on / off) after VO code or Edit FDL ECU FRM (only Edit FDL Code FRM face even if there is no change in FRM).
But the HBA button does not work when the engine starts next time
I think that in the ECU FRM command there is something that switches HBA or does not wake the HBA.

first of all if the  FLA and  SZL is used then you need to to flash it with esys , then you need to code the whole car after adding 5AC to the FA , I don't understand why you keep FDL coding some ecu's while many other ECU's are also involved in this job .. the mirror is connected on CAN2 so any other ECU's on the same network must be coded , not only KOMBI and FRM .

without flashing to update the VIN , and without proper coding nothing will work . you want this to work right then you need to do it right too . forget about some codes and values to be edited because that's Esys job to ensure all ECU's are coded correctly .. 

I recorded the work that did not succeed for HBA
1./Install the mirror with ECU FLA (connect 2 K-Can2 wires) into the K-Can2 JBBF common because my car does not have K-Can2 on the roof.
2. / Change FA (FA5AC) add 5AC without Save and vehicle, click FA5AC when programming.
3. / Detect CAF SWE for ECU FLA3 and VO Code FLA3, FRM, KOMBI, JBBF, ICM, DSC2.
4./Edit FDL FRM (FLA_AUTO_AKTIV = automatisch).
5./Logo HBA appears on KOMBI when switching off the Auto-Off-Auto light (Currently not changing the SZL Cluster with HBA button).
6. / Test car on dark roads, HBA works great.
7./The car engine and I turned on the car again the HBA did not work even though I switched the Auto-Off-Auto light switch.
8./Return E-sys check FRM FLA_AUTO_AKTIV = automatisch is normal, I do not change anything FRM and select Code FDL FRM. At this time the HBA works again when switching the Auto-Off-Auto switch. But the switch to open the car again HBA does not work even if I switch the Auto-Off-Auto light switch.
9./I think the F10 LCI 2016 BMW function HBA auto switch, which must have the HBA button on the SZL Cluster.
10./ I replaced another SZL cluster with HBA button.
11./ Enable FA5AC, Detect CAF SWE for ECU SZL_LWS, select the latest >>> Code
12./ It all works exactly what the SZL Cluster has an HBA button
Press the HBA button = On / Off, but switch the car and open the car again, the HBA button has no effect.
13./ Checking FRM and FLA3 VO Code FRM, FLA3 with FA5AC, the HBA button works. But the switch back to the HBA does not work even if I switch the Auto-Off-Auto light switch and press the HBA button on SZL with no effect.
14./ I have tried Code FDL FRM (without changing any parameters in ECU FRM), the HBA button works. But the switch back to the HBA does not work even if I switch the Auto-Off-Auto light switch and press the HBA button on SZL with no effect.
Currently I run out of ideas for Retrofit HBA  
I have attached FA5AC File