12-04-2011, 03:29 PM
Anyone have comments on whether or not to leave PSM on or off on snow or ice? Even Porsche says you can improve performance by turning it off.
Taking the plunge on snow tires anyway, but I'm left confused?
Taking the plunge on snow tires anyway, but I'm left confused?
What's in your garage?
![Cool Cool](https://rtr-pca.org/forum/images/smilies/cool.gif)