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I agree with Pierre; a large expense with little benefit.

Just thought I'd come back in and share, the Cayenne is up and running and just started today. I was given the car in February totally free from a property transaction I did with a dealer, they couldn't get it started so they figured it was junk. I posted a list of errors and it gave like 8 pages of errors with durametric which is attached in this thread somewhere, my pit bull nature the fact that as a Christian, the word impossible is foreign to me, I went for it. After reading up on threads about wiring harnesses frying up because of some leakages found in these cars, I accidentally bidded for a complete main wiring harness and had to pay $350 for it, its sitting there and I didn't need it, I thought it had the main unit I needed which was the relay box and harness in the engine pay, so I had to buy that one, not much, under $100 if I recall. While stripping the old one, I noticed that the two front drains had been blocked with gunk, this was the start of the issue. The drains blocked, water filled the compartment till it entered the relay tray and the ECU on the other side and fried some modules in the car. So after replacing the relay tray and harness, fault code drops to 3 pages, showing the engine control module, kessy module and tiptronic module were fried, so since I knew where we were going, I gave the car to my mechanic to finish up. I bought an ECU for £45 it didn't work, so we bought a paired ECU, Kessy Module and Tiptronic module installed tested it a couple of days ago and the engine started right up (See attached video) without a hickup, that's like 5 years or more ago since it started last. Total Spend so far $1000 out of which about $400 spent on parts not needed (going back on ebay). For me it's been the joy of getting another P-Car up to spec from zero another successful project, I'm looking forward to getting everything up and running, thought I'd share this as it may be useful to someone someday. VID-20170923-WA0007.mp4