Touareg: 2004 V6
Join Date: Jan 2017
Second Vehicle: a bicycle
Thanked 28 Times in 26 Posts
Like Nooby, don't even bother to look at the MFD/MDI for the mileage. If you must, just switch over to the "Since Refuel" MDF display. MFD/MFI, based on my fuel tracking under my Excel file, has anywhere between 1% to 25% error for my 2004. It's unreliable. I do the MPG tallying from refueling. Of course, mine doesn't jump from 3 to 76. Just a suggestion: clean your MAF sensor to start, and I would be looking or wornout/bare spot on the wires within the engine bay. Bad ground tends to create oddball vehicle display. Then just for your own DIY-er mechanic intuition, probe around the car for possible mods that could have cause MFD oddness. VagCom may show you old codes that probably give you a hint on where to go.
As Nooby hits it on the nail, perform a full maintenance. If you are uncertain what the old owner(s) had done, do everything for safe measure.
Once the belt and connected critical components are done, toss in:
Power steering fluid flush
Transmission fluid and filter drain and change (the longest and simple job you can do...emphasizing on the long wait for the drain)
Differential fluid change (pair up with transmission fluid).
Check/replace brake pads and rotors (pair up with transmission & diff fluid job)
While the engine is warmed, do the coolant flush.
Brake fluid flush (do it at the same time with tranny & diff fluid jobs)
Check driveshaft center bearing while you're down below..what the hell..check everything for rots, cracks, rust build-up, and damages. If the old owners were like us, we love to take our vehicle off-roading, exploring the areas were we couldn't with other inferior SUVs.
Sorry to slam it all on you, but high mileage vehicle requires TLC; lots of TLC means long lasting driving pleasure.
When life offers you a blessed world to explorer, why stay home and see the adventures through others' eyes.