Some options
1. Don't buy, borrow. From an auto parts store or a friend.
2. If you buy, be aware that generic code readers can only do so much and there are Porsche specific codes that they won't clear. Actron is the most common brand.
3. Next in capability is the Durametric s/w. It does all of #2 and some Porsche specific stuff. But not all.
4. Porsche specific tools like the PWIS or PST2 do all the Porsche codes and options. They are hard to come by and expensive.
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