After a couple years of driving on rough roads , car steering components usually gets loose and start to make clunk and rattle noise , steering rack is the major component of the steering system in a car ,
every steering rack has an adjustment to overcome for the free play developed after years of use , which is called a steering rack preload adjustement or a yoke screw adjustment
steering rack can develop noise due to two types of freeplay either vertical or horizontal , in horizontal play mostly chances are that your rack gear has worn down enough , but vertical play can be adjusted .

performed on a volkswagen polo , remains identical for every vw car out their like vento , ameo , golf , jetta , passat , skoda rapid , fabia , octavia , audi a3 , audi a4 , and similar for every car with a rack and pinion setup , just the position of yoke screw differs.