Can you make 6 figures in Berlin? (In London, it's doable)

I hope you're not saying "low pay" because you compare to the USA. The Europe and the USA are not in the same league, they shouldnt be compared.

100k+ is definitely possible in Germany but hard in Berlin itself, even for a principal engineer.

I'd say you need be be at least Manager/Director/VP of engineering, depending on the size of the company.

There is a difference between "acheivable" and "culture". I should also probably add I'm thinking of London-Non-Finance which is admittedly smaller than London.