Not sure which vehicle you are referring to. Most modern cars are not fitted with a radiator drain plug. To drain the system, you usually have to loosen or remove the bottom hose.
No.
if its a 300 tdi it will be in a round pot at the front of the engine next to the radiator
You have to take off the belly pan and it is in the big silver pan!
Define 1997 Jetta: GL, GT, TDI, GLS or GLX model?
Take the skid plate of the bottom of the engine compartment. The oil drain plug is located on the back center of the oil pain. It's a 19mm bolt.
tdi200 gearbox[ie LT77] is better than tdi300
A TDI doesn't have spark plugs. It has glow plugs.
http://www.fishh2o.com/Misc/Misc/Passat%20Radiator.html
rtrt
there is no difference between a landrover 200 tdi and a discovery tdi ! A 200tdi is a discovery tdi . I think you mean what is the difference between a 200 tdi and a 300 tdi,in which case not a lot ,apart from slightly different engine and box ,rear lights and bumper and head lights and grille. basically the same motor apart from these few things
Sealed unit- you can't. However there is a drain plug/level indicator toward the rear of the gearbox. Here is a good description. http://forums.tdiclub.com/showthread.php?p=288052
where is the gearbox filler plug for 2001 citreon relay 2.8 tdi