Yes. you can definitely use these detergents to wash your M800 car.It will not affect the paint of your car. I'm also doing the same for many years.But use a good piece of cloth for cleaning and wiping your car.You may use a glass cleaner such as colins etc. but its ok if you wash wit with the detergent. Keep the quantity of the detergent used low though.
============
used car
used car values
