Seems pretty low. its also on Tokico shocks and springs, not my choice but the car came with it. Thinking of possibly getting different springs for it in the near future to raise it up a bit, make it a bit more realistic for daily driving. 
The 318i(s)'s are notoriously low at the oil pan. I have a 12 gauge oil pan shield, but i just measured and its exactly 3.5" from it to the floor of my garage. Seems really low. 
How low are your cars from the oil pan/guard to the ground? 
I'm interested to know what stock is, and what various suspension set ups are as well.