German phrase
Wären Sie so freundlich, ~ zu tun?
Meaning
Would you be so kind as to do ___?
When to use it
A very polite request. It works for respectful favors, from everyday to formal.
Example dialogue
Wären Sie so freundlich, das für mich zu tun?
Would you be so kind as to do that for me?
Ja, das mache ich gleich.
Yes, I'll do that right away.