@ Alchemy- If your dealer has been straight with you on all other services in the past, they were likely straight with you on this one, all though next time I would recommend paying a little more and having the injectors pulled so they can be back flushed and have the o-rings changed. I run an old Audi, and my friend has an ultrasonic cleaner so i clean my injectors myself. The difference in performance is definitely noticeable. If you have the patience and the skills DIY fuel injector cleaning is the way to go. You can also offer it as a service and make money on the side.