I'll second what Tifosi has mentioned. Here's my 2 cents: The easiest (& the most economical - it won't cost a penny if you have regular tool set & a jack) of all is the steering gearbox adjustment, if you have a ZF box. Raise the front off the ground (it's important) and loosen a locknut (19mm IIRC) at the top of steering gearbox, tighten (not too much, just make it snug) the screw inside of the nut with a flathead and tighten the locknut - you are done. It has worked on two of the series 3 Spiders my mother has owned!! If you have a Burman box you'll have to remove shims (washers) from inside of the box, which can be done w/o removing the box from the car but I have not tried this myself so I let somebody else explain...
Hope this helps,