The under body trays on most modern vehicles are used not only to protect the systems from road debris and weather but to also manage the air flow under and around the vehicle. The Volkswagen Touareg is no exception even though it does not have as many trays as some vehicles. You will need to remove these trays to get access to most of the work you will want to perform under the vehicle.
Begin by safely jacking up and supporting your car. Please see our article on safely jacking up and supporting your Volkswagen Touareg.
There are two under body trays on the Touareg: the forward engine tray (red arrow) that attaches to the transmission tray, and the transmission tray (yellow arrow) that attaches to the engine tray and the transmission cross member.
Gently pull back the side cover and remove the 10mm bolt holding the front tray to the chassis (red arrow). Next you can remove the three 10mm bolts on the front and four connecting it to the transmission tray and lower it from the vehicle. Watch out for any fluids or dirt that might be trapped on top of the tray.
With the complete trays out of the vehicle you can see where you remove the four forward 10mm bolts and two rearward bolts (red arrows). Next, slightly lower the tray and slide it forward so the plastic tab on the rear (yellow arrow) slides out from its holder in the cross member. Installation is the reverse of removal.