When you open the online application form for the AMEX Gold card at comdirect.com, it tells you what income is required. You must have an annual gross salary of atleast €40,000.
"Ihr persönliches Brutto-Jahreseinkommen in Euro*(min. EUR 40.000)"
To be considered for an AMEX Gold card with Commerzbank, you must have an annual gross salary of atleast €40,000. For the AMEX Platinum, it's €60,000.
Oh sorry I meant the normal AMEX charge card that you apply for from AMEX, not one of the co-branded cards.
Many thanks for all the comments to my message of 5 August.
It seems that it is not possible for a non-resident to open a Girokonto with com direct: ("Die Eröffnung eines Girokontos ist jedoch nicht möglich, da für im Ausland lebende Kunden die Datenbasis nicht ausreichend ist, um eine solide Entscheidung zu treffen").
However it appears to be possible to open a Tagesgeld Plus Konto (which I take to be a general current account).
If anyone could advise on the difference between these two accounts, I would be most grateful (though I am trying to get this information myself through the internet).
The application appears to allow you to apply from abroad, I was given the option of selecting UK when going through all the details although I've changed my mind and will be going to Commerzbank as I'd like face to face while opening the account