I'm not sure if these questions are more appropriate for the detailing group, but I think they fit better here. Anyway, I just got transmission fluid service done at a local MB shop. I asked the tech about washing under the car to prevent rust. He recommended against it becuase he felt spraying additional water under the car may actually promote more rust. I live in a costal area, so I have some concern about airborne salt, but it rarely snows here, and when it does they don't salt the roads. Should I clean under the car?
The tech suggested that I may want to clean my engine using the Castrol product and then hosing the engine down. He told me to stay away from the battery, but not to really worry about other components (just don't hose in one place too long). Does this sound like a good idea?