Hey Mama
S-Type refers to a model of Jaguar. The S-Type Jag is a midsized sedan.
The S-type could also refer to a Mercedes Benz S class, commonly accepted as the most luxurious of the Mercedes Benz line of sedans.
this song is dedicated to Kanye's mother Donda West - here he asks her what kind of Jaguar S-Type luxury car she wants him to buy for her. He's now famous and rich and can take care of her, as she has always taken care of him.