The Sorento clocks have had problems they have been replaced to just fail
again. Yeah they don't keep time thats the smallest part many just quit
working total.
Here is a really good forum to find out about Sorento problems and other
subjects.
http://townhall-talk.edmunds.com/WebX?ed_displayMakeModelRelatedDiscussions@@.ef
14c39!make=Kia

Yup, seems to reset itself to about 1:00 once she's been left a while.  
Some days when I've been in and out all day it's ok, but by next morning
it's reset itself again.

Did get a shock on Sunday as it was working fine, albeit 2 minutes slow,
but then realised I'd first got in the car just after 1pm!

Only problem so far in a 2 week old car, and probably the least
complicated piece of electrics in there.  Will ask them to have a look
when I go back at 1000 miles for a check up

Clock failed after 18 months. Supposedly replaced with new one thta fialed
within hours. 1ST one also had leds fail.
KIA knows about this is seems to be prepared to go on replacing for life of
Warranty (5 years)
does the new 6 cd changer have a built in clock ?