I finished my AWD conversion on my '09 SE, which I can now say is fully 4motion and 100% indistinguishable from factory. It has all the heatshields, wiring, etc. Even the badges and stickers now are correct. It will be the replacement vehicle for my daughter, whose SEL was destroyed. The Golf R that I am building will be my new daily driver.
Overall, the conversion to AWD on this '09 was very straightforward. It literally bolted right in. The rear diff bolted on to the rear subframe, the center carrier bearing support replaced an existing bracket, the exhaust did not need to be changed. I did need to replace the rear bearing housings with those from a 4motion, change the rear ABS sensor harnesses, as the FWD harnesses are too short to get to where the AWD bearing housings have the sensors. This did require dropping the whole subframe though, so that is when I put in the Golf R suspension. The harness for the rear Haldex rear diff is just four wires, power, ground CAN hi and CAN low. I have 18 hours into the swap, including 12 yesterday, but not including the time to get the replacement 4motion parts. Most of it came from a '09 SEL that someone junked with a jumped chain at 95k. I found it at a pull and pay yard and spent an afternoon getting that stuff stripped out.
This car has had quite the life. I bought it a few years ago with 92k and a seized engine (balance shaft - change your oil people, with good oil and factory filter) for a junk vehicle price. They literally just wanted it gone. I found an engine with 70 miles on it from a '13 NTSA crash test Tiguan (found the video of the test on youtube) on car-part.com complete from pan to turbo with harness and gave it to my daughter as her first car. It got hit in the front by a guy running a red light a few months later and insurance totaled it. Everyone was OK, and the bags didn't blow, so it wasn't a high energy impact, but it was enough to total it. I had it in perfect shape, with a pretty much new engine, so I kept it and just got the difference from insurance, found a hood, bumper and headlights from an SEL on craigslist, bought new core support, bumper support, radiator and fans and had a body shop get it straightened out and painted. It was now even better than I had it before, as the normal rock chips, etc were gone and all the alignment specs were zero'd. Seeing this is pretty much a "free" (other than my labor) car for me, I made it a project and put in mk6 Golf R suspension, 19" Savannah wheels, GTI steering wheel with paddle shifters, power folding mirrors, self dimming rear view mirror with auto lights and wipers, puddle lights, stainless GTI/GLI pedals, MIB2 headunit, and I WAS going to put in the rebuilt original engine with head work, a Golf R turbo, IE intercooler, mk7 Golf R brakes, mk6 Golf R seats (from my R - a friend turned a mk7 R into a racecar, so I bought that interior) and Dynaudio sound system. Now that stuff will need to find a new home, so I am on the lookout for a '13 SEL with engine damage, or I will sell all the R conversion goodies.
So, now instead of being what a Tiguan R should be, it will just be good, safe transportation for my daughter with some modern touches like the MIBII, auto headlights and wipers and a nice steering wheel. I will have to find another one to build.
If anyone has a line on a '13 or '14 SEL, preferable in white or blue with black leather and needing engine work (hey, I can wish right?), I am in the market.