To temporarily remove it - just unscrew the 4 screws that hold it on, near the corners.
To permanently remove it - takes quite a bit of work, as the plastic skid plate is integral to the stability of the front-end bodywork; and i would therefore not recommend doing it.
It is on the bottom of the oil pan. You have to remove the under engine plastic cover.
Plenium cover.
It's directly underneath the plastic cover that covers the top of the engine, the plastic cover pulls off and the intake plenum is underneath it.
It is on top of the engine, Forward of the Turbo Charger. (under a plastic cover that flips up)
Pull it off
They are in the center of the Valve cover, under the plastic "chunks" that are the ignition coils. You might need to remove the plastic engine cover first. There are several plastic clips you need to turn part way to remove this part.
check this out, it's same engine as in Rabbit http://rabbitownersclub.com/vw/showthread.php/engine-plastic-cover-4981.html
You remove the large plastic engine cover from the top of the engine (remove the three plastic caps, then loosen the three 10mm nuts). It's right on the front top of the engine under a plastic cap about 3" in diameter.
To remove the plastic engine cover from a 2005 Cadillac SRX, first, locate the retaining bolts or clips securing the cover. Use a socket wrench to remove the bolts or carefully pry off the clips with a flathead screwdriver. Once the fasteners are removed, gently lift the engine cover straight up to detach it from the engine. Be cautious not to damage any underlying components during the removal process.
PCV valve is located in front of the engine, behind plastic (long and narrow plastic cover that covers valves and fuel lines). You need to remove one hex screw that attaches plastic cover to engine and remove plastic cover. You will see pcv valve 3-4 inches to the right of the hex screw that was attaching plastic cover to engine. Once removed you will see silver pipe at the end of the pipe plugged in engine sits PCV valve. PCV valve plugged into engine by it's mettalic side, so only plastic side is visible. Easiest way to understand how PCV valve sits is to buy new valve in auto parts store, remove plastic cover that covers fuel lines in front of engine and find a part that looks like PCV valve.
To remove the plastic engine cover on a Fiat Ducato, first, locate the fastening clips or screws securing the cover in place. Use a socket wrench or screwdriver to remove the screws, or gently pry off the clips with a flathead screwdriver. Once all fasteners are removed, carefully lift the cover off the engine. Be cautious not to damage any connected components or wiring during the process.
To remove the plastic cover on the engine of a Ford Fiesta 1.25 2008, first, locate the plastic clips or screws securing the cover. Use a flathead screwdriver or a socket wrench to gently pry off the clips or unscrew the fasteners. Carefully lift the cover off the engine, taking care not to damage any attached components. Once removed, set the cover aside for any necessary maintenance or inspection.