The 520 Pro is handy. I'm using it. It has so many menus and options. I'm finally digging deep into its features. Knowing switch inputs is handy. For instance, the Foxwell tells me three switches are pressed when they are not. I'm assuming those switches have internal shorts. It may be the reason mine is not going to sleep and has amp draw. Knowing where to look is better than random problem chasing.

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'06 X5 3.0i - bought @143,123 miles (12/26/20)