Well, brake cleaner, grease, white grease, mechanics rubber gloves, seat protector, paper floor mat, steering wheel protector, legally compliant disposal of old oil and filters, etc.
Many garages hide it where they add their 10% cut on parts prices from their supplier. We think theyre being really nice to us because there is no 'sunderies' or 'environmental charge' itemised separately on the invoice, but they aren't.
Main dealers often have their parts prices dictated by the manufacturer and cant do this so they itemise it separately on the invoice instead - if anything that's the open and honest thing to do.
In either case, one way or the other, every garage stiffs us for it.