If you pitched only one vial, you underpitched by about fourfold. A lager needs more yeast, and any beer (even an ale) over about 1.060 needs more yeast.
16 hours is way to early to worry! With only one vial, you may have a very long wait before activity shows. Maybe 4 days or so, so don't worry for at least 3.5 more days.
Consult mrmalty.com and check out the yeast pitching calculator next time to see how much yeast is desirable for your batch.