Looks like the same mess as with T4s. Suggest the OP contacts VW customer service direct, we know the dealers are useless when it comes to Touaregs, and gets a definitive answer from them which can be shared on the forum.Brian from Nottingham [previous owner of 2010 Altitude, 2012 SE, 2015 R-Line] has very kindly taken the trouble to shine a light - literally as it was attached to a mirrror - on the coolant fan wattage this morning.
He has just taken delivery of a new Generation 3 [T5 in our terms] 2020 R-Line with a factory fitted swivelling towbar and he has confirmed that the Bosch coolant fan is 850 watts and has an Audi badge.
I have a strong feeling that we are back in the 600 watt no factory towbar/850 watt factory towbar scenario once more.
Someone with a new T5 that has no towbar needs to do a Brian please and report back with findings!
Think we all know what it'll be though, a very expensive upgrade required to overcome VW penny pinching.