THE MERCERDEZ BENZ OWNED BY 50 CENT`S SON

Rapper 50 Cent and his lovely son Sire, they have matching rides ... After 50 Cent surprised the boy on his 2nd birthday with a miniature motorized Mercedes ML450 SUV. Whatever happened to Big Wheels?

AND According to our source, 50 CENT surprised his boy in Los Angeles this weekend with the sweet little car ... which 50 picked out himself.

We're told the two spent the weekend together eating lots of birthday cake and 50 footed the bill for his big party on Monday.

Go GO shorty, it's your birthday!