uber comes from the German language. It is a cognate of both Latin super and Greek ýðåñ (hyper). It can mean different things in german but super is most common.
uber = super
leet (1337) is an english word and has two different meanings, one being elite but origanally meaning cool in the 2000s.
leet = cool
uberleet = supercool
Man, that new snowboard you got is uberleet!
Uber = Very in german, but used as "Super" to "l33trz"
Leet = Elite, good.
L33trz = See Leet Speak.
Uberleet = Very good!
y0 d00d, th47 ph47 |-| wuz u83rl337!!!!!!1111 v3r1ly d00d!