I have taken my subaru to this dealer for 5 regularly scheduled maintenances. I own a subaru outback xt and there is a plastic engine cover that is bolted on or clipped on. I noticed that after one of my visits the cover wasn't re-attached. It got me thinking that if the mechanic can't take the 1 minute it takes to bolt the thing on, what else are they not bolting back on that I can't see?
When i pointed this out to the dealer, they tried to charge me for somewhat expensive bolts for the cover. I pointed out to the dealer that they lost the original parts, and rather then giving me the bolts which they lost, they used some cheap plastic clips to re-attach the cover.
I would like them to treat the vehicle as if it were their own. I don't think that is an unreasonable expectation.