Not sure what was available in Australia, but in NAR all Touaregs have a 100L tank. Best thing you can do is take your VIN to a dealer and have them print out your vehicle build sheet, which tells you exactly what equipment/options are installed in your specific vehicle.

 

X2 on the build sheets - several pages of useful info every owner should get.

 

If it’s a 100l tank when you fill from 1/4 it should take 70-78 l in my experience

 

I’ve definitely put in 90-95L till the auto-shutoff in my 2015 on several occasions.

 

In Australia, all V6 Touaregs were fitted with an 85 litre tank.

UNLESS you have the 180KW V6 engine WITH comfort package included. Then you would have a 100 litre tank.

 

Thanks mines a 180 Kw but no comfort pack

 

Don't fill it from empty. Too much of a chance of overheating the in tank pump.
Fill it up when your at 1/4 of a tank. You should be able to calculate the capacity from there.

My '11 VR6 LUX has a tank capacity of just a little over 26 gallons.

 

Yes that was my intention have seen the overheating issue in Ford Territory but the trg has double the problem

 

In Spain only the Terrain tech version have a 100ltr tank, the other common models have 85ltrs

 

The 100 litre tank also came as standard on European models when the remote control parking heater was selected as an option - but that option may not have been available in Spain's warm climate.

 

I've got a North American 2014 with 100 liter tank. FWIW, the Touareg has by far the most hyper-accurate fuel gave I've ever seen on a car. When it says full, it is full. When it says 3/4, it is 3/4. When it says half, it is half, etc. I tested it by filling the tank when the gauge was reading different amounts, and it was spot on every single time. Assuming the 85 liter is similar, you can just top off the tank when it reads exactly 3/4 or 1/2, and extrapolate that to the full tank size.

I suspect the "gauge" is actually just a number calculated by subtracting fuel based on how much is pumped through the fuel injectors. And the float is only used to reset the level when you add fuel to the tank (if you add a very small amount, like 1 gallon / 4 liters, it won't register that any fuel has been added, and the gauge won't move). So the accuracy may be diminished if you repeatedly don't fill up the tank to full.

 

It's been discussed ad infinitum.

Diesel lubricity in the US in particular seems to be a problem.

Hot diesel not wanted by the engine is returned to the tank and isn't cooled sufficiently on the return without the contents of the tank itself helping.

HPFPs grenading are a known issue and the repair costs can be up to US$16,000

You can either treat 1/4 full as E to help or not.