Most benzs apart from carby ones have a cold air intake anyway.
The benz takes it's air frrom infront of the radiator and sends it straight to the more than ample size air filter box.
Cold air induction kits are made for cars with pod filters. People install pod filters (which in some cases actually reduces air flow) inside the engine bay, removing the standard air filter box and piping. The pod filter is now picking up hot air from the engine bay instead of cold air as it would if the std filterbox was installed. This is when you need a cold air kit.