T.I. Gifts Tiny $225k Custom Mercedes-Benz for Her Birthday

T.I. pulled a fast one for his wife, Tiny, getting an Atlanta customizer to soup up a $225k whip in less than 24 hours ... so he could hand her the keys on her 43rd birthday.

T.I. hooked up Tiny with a convertible Benz S550. The ride alone costs about $130k, but Tip had another $95k in bells and whistles added.

True Cooper from Atl Custom Auto Sales tells us they added a custom black wrap with an all-black-everything finish, and put it all on 22" wheels.

They had to work fast ... True says he got the call a little after 2 PM Friday, and T.I. said he need it by Saturday, which was Tiny's birthday. A crew of three was able to complete the order by 1 PM the next day.

As for the giant Christian Louboutin bags in the backseat waiting for Tiny -- those were not included. Score a few hundred more hubby points for T.I.