I do a "walk around" while fueling. Engine off check the belt....<had to replace it yesterday, split after 135,000 miles> A lot better than it use to be. Replaced it after every 10,000 miles. Replaced the turb o res with the new design for the sprinter. It was leaking on the back side, outlet, not where it norm fails. Thinking about replacing the upper intake hose fitting with the new disign as well.... Replaced the 90 amp alternator with a 150 amp. After replacing the front wheel bearing, noticed a large flat spot on the right tire....Ended up replacing two tires after 165,000 miles. Get the other two next month. While I'm stopped I can look back to the rear and hit the brake and see if the lights work. Bought a scanner to read and reset the codes. Took a load this last week for around 450 miles and went into "Limp home mode" after 200 miles, Code was P0299 turbo under boost...hummm, another hose with a hole? Nope. Took to dealer and sure enough they coudn't find anything wrong. Ok now what? Removed the K&N air filter and cleaned it, went on a 60 mile test drive and no limp home mode happened.
Well in short, Yes I do a walke around, maybe I shouldn't...LOL