Mercedes has a depth of engineering expertise that Tesla can only dream of having.
Right, Mercedes does have a depth of engineering expertise in internal combustion engines and transmissions. Make a wild guess if Tesla would ever need that.
Tesla is a con job. It is a bunch of laptop batteries stuck in a Lotus chassis and it is a TOY, not a car which can actually be used to go anywhere in the world.
a) what you say shows that you now nothing about Model S;
b) very few people need a car that can be used to go anywhere in the world
Adding manpower to a late software project makes it later. -- F. Brooks, "The Mythical Man-Month"