I was approached by the gentleman that serviced my car and he took me aside and told me that if I paid him a substantial tip that he would do some of the work that was needed done on my car. He said there was no need to let the service manager know. He kept coming over telling me he had cleaned my battery and he left this can of battery cleaner so that I could clean it when it corroded again. also he can over to let my engine filter was placed. I asked one of the service guys was it customary to pay a tip, and he said that he had never been asked that question before. This has never happen to me before and I didn't appreciate this gentleman approaching me in that manner. It makes me wonder ,did all the things that was done to automobile on Saturday was it necessary, by the time I left my bill came to $735.56. I came in for an oil change, okay they told me I needed back brakes, were they being honest. I don't know I guess it's time I find another Subaru service center to maintain my car.