I am new to Mercedes in that I purchase a 2015 ML350 in Feb, a CPO model. I would review the items they check during a 40,ooo mile check and things like checking tire pressure, replacing windshield wiper and things you can do, delete them from the service. Just have the dealer check stuff like replacing dust filter, combination filter, or other stuff. Some call this an ala carte service . Thats what I do. Also, it makes no sense to have them check that will not be covered by the warranty. You could get that done somewhere else or at least have them give you an estimate on it. Also ask the service person to look for any stuff since it will be soon out of warranty. At least this way if you have a problem later on and want Mercedes to fix it, you have a record that you took it to a dealer while it was under warranty. Just my thoughts