Only info I can supply is ...

A - Ceramic glow plugs are colour-coded with a “white seal”
B - Metal glow plugs are colour-coded with a “red seal”
Other info:

Mixed installation of ceramic glow plugs and metal glow plugs on the same engine is not permissible.
The software of the engine control unit is specifically adapted to either the ceramic or the metal glow plugs, so it is important to install the correct type.
As you got VCDS if you check adaptation in module [1] does balloon appear telling codes etc...

I wouldn't adjust anything only look maybe post screenie..

I can't find info on this and can't check on my car at mo..

But PM to A8 Tech may reveal VW AUDI Forum - VWAF