Agreed, had no issues.
My process in April when I did my TB change on the EA288 ... refilled as much as possible into the expansion tank, over a period of probably 30 min to an hour. Then in VCDS, ran each electric coolant pump (one for the intercooler, one for the heater), each of which sucked a little bit out of the expansion tank. Added more. Repeated. Once gravity wasn't taking any more in, and running those pumps did nothing obvious, ran the engine, drive around till the lower coolant hose was pressurized, let it cool down, added a bit more. Done and no issue since.
Roughly I used this procedure as described on the Ross-Tech forum by a post there by "NETech" a VCDS distributor.
This is not exact procedure, maybe it helps someone testing.
EA288 can be many different engines and cooling system layout, different pumps etc!
Information from erwin is needed and right equipment, VAS 6096..
Just a few engines: CLHA, CRBC, CRKA, CRKB, CRLB, CRUA, CVCA, CUNA, CUSA, CUSB, CUTA, CUAA
We have not seen an Autoscan from your A5.
1)
Ignition ON - Engine OFF
[16-Security access] Shown (maybe not needed for all systems/engines)
[10-Adaptation]: "IDE08287-Bleed cooling circuit" > Active > [Do It!]
Wait 10 sec. > Start engine at idle
[16-Security access] Shown
[04-Basic Settings]
[Show measurement Data] values/information:
IDE00021 / IDE00085 / IDE00322 / IDE00450 / IDE00451 / IDE00787 / IDE07725
[04-Basic Settings]: "IDE08087-Test - Bleed cooling circuit" > [Go!]
About 6 min. Idle > 2 min. 2500 Rpm > 6 min. Idle > Look at measurement values/information's:
"Finished correctly" and IDE00322 = "was ended"
[04-Basic Settings]: "IDE08087-Test - Bleed cooling circuit" > [Stop]
Stop engine > Ignition ON
2)
[16-Security access] Shown
[04-Basic Settings]
[Show measurement Data] Search and load measurement values/information's:
IDE00021 / IDE00085 / IDE00322 / IDE00450 / IDE00451 / IDE00787 / IDE07725
[04-Basic Settings]: "IDE04795-Test - Bleeding of low temperature circuit" > "4 sec." > [Go!]
Time: maybe 5-10 Minutes? Look at measurement values/information's
[04-Basic Settings]: "IDE04795-Test - Bleeding of low temperature circuit" > [Stop]
Repeat 2) 3 times total ?