Point out especially:

The upholstery requires regular maintenance to retrain its qualities, one to four times a year (more often if needed).
Sharp objects and Velcro straps may damage the vehicle's upholstery.
Materials that color, e. g., jeans and suede, etc., may discolor the vehicle's upholstery.
Never use powerful solvents. These may damage both textile, vinyl, and leather upholstery.