The 2009 Volkswagen Routan SEL is a relatively easy vehicle to maintain, and a good choice for someone experienced in vehicle maintenance. Changing the headlight is no problem, as you only have to reach behind the housing for access to the bulb. The engine air filter is easy to access with reliability. You only have to disengage a few fasteners for access, and these fasteners are easy to disengage. Checking the oil level is easy to do, as the oil dipstick is easily accessible in the engine bay.
Some things are more problematic on the 2009 Volkswagen Routan SEL. You will have to lower the tire from under the vehicle for access. The lowering mechanism can grow rusted to the vehicle over time and be a problem to turn. You will need to use many tools in order to complete many steps to access the reverse light on this vehicle. Other models make this access much easier. Changing the cabin air filter can be a problem, as you will have to lower the glove box for access. This would have been easier if there were designated access panels in the rear of the glove box for access.
Hans Angermeier has produced over 100,000 videos showing drivers how to fix things on their cars. He has broad expertise on basic repair procedures covering the majority of cars on the road.