So to use or not to use a winter cover o the Benz ?

I use one on my 02 dodge cummins and it does not seem to bother the truck at all I block off the entire front grille and since the truck is 4x4 it still gets lots of air from the lower bumper vents and under motor

I may look into making a nice grille insert for the benz

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2003 GX470
1998 E300 3.0TD
2002 Dodge 2500 4x4 cummins
1998 Dodge 3500 5 speed Cummins