Winter tires '05 E500 4matic 17 vs. 16
 

Hi all,

I just got my 2005 E500 4matic and I am looking for winter tires but I am not sure should I stick with 17 or go to 16 in.
My original tires are 245-45-17. A guy in a tire shop tells me he can get me sweet dealfor 16in. with additional set of 16in rims (Mercedes orig.).
I was wandering if 16in. would be ok for this car. Also, if I go with 16 in. what size? 225 or something else.
I would appreciate youroppinions.

Thanks,
tzar