id recheck it again at operating temp. let it sit for a few mins after shutting down. too much oil is worse than too little. mine says 5 qts as well (all except turbo, which is 5.5 qts. also remember qts are different that liters.
liters are a bit less than a quart ( but not enought to make much difference)
also make sure the dipstick is all the way in place when you check.
better to be safe than sorry
as long as its in the safe area your ok
just my opinion