OK the snows melting and the nice weather is coming back time to clean up those diesels!
I recommend starting with a good wash, including the engine and undersides. Then clay the paint and follow that up with a nice polish. Finish the paint off with two coats of a nice wax.
Now onto the interior, 303 the heck out of it and vacum away.
Don't forget the door jams!
Pull the wheels off to inspect the suspension and Simple Green the wheel wells. They look awsome clean and are not hard to keep clean. Don't forget to clean the brake dust out of the back of the wheels.
A clean MB is a happy MB!