That's a multi page answer, if you want give me an email and I will scan and send you the pages from a maintance manual stapo22
The Torsion bar is a suspension component. It essentially "twists" ever so slightly to adjust ride height. This is adjusted by a special tool specific to the manufacturer.
http://www.suzukituning.com/PSA/Suspension/Lowering.htm http://www.saxperience.com/forum/showthread.php?p=927702 Good luck matey
there is no way to adjust the ride height other then aftermarket suspension parts
Raising the ride height of the front suspension is best accomplished by installing adjusters to the torsion housing, or buying a torsion housing (front beam) with adjusters already installed. These adjusters and modified torsion housings (front beams) are available from numerous VW parts sources.
you don't computer controlled, or replace the suspension (shudder) expensive.
No you can not, at least not with the original or OEM suspension.
you have to have a special height sensor tool that can adjust it for you, go to the local parts store and see if they sell it, or if your lucky enough to have a friend that has one.
Easier than you think, no special tools required
The 1995 Nissan 240 emergency brake has an adjustment screw on the brake pad. Turn the adjustment screw to adjust the brake height.
Raise and support the front end. Follow the bars back to the transmission cross member. There is a large adjusting bolt at the end of each bar. Tigthen it or loosen it according to you preference. Tightening it will raise it. I believe the 95 has nuts above and below the crossmember. Loosen those before you start making adjustment. With a measuring tape match the length of the bolt coming out of the top on both sides to get an equal ride height. Drop the truck on level ground to check your ride height.
I am pretty sure the dealer can do it or you can but a NGS scan tool or something similar.
My 1993 Hiace has a Torsion Bar Suspension on the front. The tension retainer is halfway down the vehicle. Jack the vehicle up - remove the wheel, then undo the locking nut on the end of the torsion bar, ( mark with a dot of paint so that you tighten the bar to the correct vehicle height on reassembly) Once you have released the tension its a doddle to remove!!