The 2007 BMW 750Li is a relatively difficult car to maintain when compared to other similar luxury models. To access the petcock, you will have to remove a large panel from under the vehicle. This will require you to use tools as you contend with gravity. Changing the headlights on one side of the vehicle can be a problem, as you will have to remove the air filter housing for access. Other models will provide more reliable access. Removing the battery can be difficult. You will have to take out the spare tire, remove a torx bolt, and work in a more cramped location than usual in order to complete.
Some things are easier on the 2007 BMW 750Li. The components of the spare tire are easily accessible in the rear of the vehicle. This keeps the tire and jack kit ready to go in case of emergency. The cabin air filters are easier to change than usual, as they are easily accessible in the cowl of the vehicle. Checking the power steering fluid level is no problem, as the fluid reservoir is easily accessible in the engine bay.
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.