From Villagio Mall....
Exit right on to Al Waab st
continue on Al Waab past Hyatt Plaza get to the left lane as your gonna turn left on Furousiya st(Stop Light)
Continue on Furousiya st, stay in the middle lanes, go under Salwa Rd, at the first R/A first exit right...
You will have seen the service center on the right befor you reach the R/A...
If you look this up on google maps, it will look like you cannot get there via this route.