Photo to better understand what I’m trying to say....

 

Make sure it's the power steering system (fluid dropping?)

PS : you can only use the green cap fluid for refills - NOT ATF!

Here is the parts list for your V10 power steering

Online Volkswagen Touareg spare parts catalogue, Europe market, 2007 model year: front axle, steering group, oil container and connection parts, hoses, for power steering subgroup, Volkswagen VIN decoder, aftermarket, etka online

 

Make sure it's the power steering system (fluid dropping?)

PS : you can only use the green cap fluid for refills - NOT ATF!

Here is the parts list for your V10 power steering

Online Volkswagen Touareg spare parts catalogue, Europe market, 2007 model year: front axle, steering group, oil container and connection parts, hoses, for power steering subgroup, Volkswagen VIN decoder, aftermarket, etka online

Why would I use ATF for the power steering??! what the hell lol

 

Join the UK Touareg site too if you haven't done so.

www.mytreg.com

For about 7 euros you can spend an hour here downloading all the workshop stuff for your car.

https://erwin.volkswagen.de/erwin/showLogin.do

 

First, If not 100% sure, clean off the area and monitor for the leak to reappear.

Second. The power steering pump is picky. Don't use an universal fits everything import fluid. You will regret it. Find out which fluid is specified and use any fluid that is listed as compatible with that spec. Repeat: The power steering pump is picky and will start to moan and groan if you put an universal fits all fluid in it.

Luck.

 

Some people can do funny things and regret it.