I have a 2004 pre-facelift S203 with Audio 30 APS and UHI (code 386). I purchased Mercedes BT SAP V2 adapter (A 204 820 05 35).

When trying to pair the adapter with my phone the instrument cluster shows 12 digits of the pairing code, which is supposed to be 16 digits in total. I have not been able to figure out how to read those hiding digits.

Is there a way to get the hiding digits visible somehow, or is this adapter incompatible with my system?

If the adapter is incompatible, which adapter would work? Or would pairing in another vehicle with different setup provide a work-around for the problem?