As far as tire size, you should be fine as long as you stay within the same overall diameter. Going with wider tires is fine if you match it with correct sidewall height, which is what most people do. There shouldn't be any issues with the traction control. Traction control works by reading wheel speed. A lost of traction is determined if a wheel is spinning faster than the other, so you want to keep the speedometer reading consistant with the factory parameters.
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[09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R]
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