Looking for a WG for rent in Berlin starting from May 24th

REAL ESTATE
Dear all, 
My brother Masa is moving to Berlin, so he'll be looking for a WG for rent in Berlin starting from May 24th. 
He was a senior mechanic at Honda Motors for many years and now he wishes to extend his studies in Germany.
He speaks Japanese and Korean and is learning German, so he'd be totally up for a language exchange if you wish. He can also provide a motorcycle fixup:)
Please feel free to contact me with anything!

Facebook:https://www.facebook.com/ehiang