When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Does anyone know if there is software available along with a hookup cable to the diagnostic port where I can monitor all sensor values and feedback just like the handheld the dealer uses?
If you go to the "Tuner" forum in the C4 section there are some suggestions. I use my laptop with Diacomm software. I thought about building my own cable too and decided to buy one from AKM at http://www.akmcables.com due to the price and support. Everyone I know that purchased from him liked them. He also provides parts kits to build your own. There are many choices out there to choose from.