How do I change an automatic gearbox's settings?

I really think you should go to www.reliable-store.com they have got books on every vehicle and also how to service/repair it, parts info, wiring diagrams, electrical diagrams, fuse diagrams, error codes,
etc everything

check the pivot pin for the gear lever at the turret at the top of the box. you can check the shift rail operation her if you take the turret section and gear lever of the top of the box.

While just change ATF oil or CVT oil in transmission & old filter too. your car problem will be solve....

Sounds like the gearbox filter need replacing,,, very common... drain oil . remove gearbox sump. filter right there,

http://dieselgiant.com/mercedestransmissionfluidchange.htm

first.the mot is a govenment safety check,it is not a mechanical/electrical fitness test.so it passed an mot.....
now the gearbox W is for winter setting,it allows the car to pull away in 2nd gear and change slightly higher,NOTHING ELSE.
the gearchange has nothing to do with cruise control..or vice versa...
if the car wont go into/allow you to change then either its the selector plate or the gearbox inhibitor at fault......could go anytime.

i can't change into 2nd,4th and reverse gears. i think its a gear lever cable not sure doe any ideas?

My Isuzu KB300 D/C Automatic has a problem.I assume it was the diff-lock, as the diff sometimes make a funny noise when changing from 1st to 2nd gear.Sometimes when I pull away,it's like the wheels get stucked and the Ldv does not want to move.When I pull away at sharp corners,its like the wheels are stuck. I have to move very slow in the begining. Today the ldv decided not to move.The ldv has only 102000km. Any ideas what could it be?

Your description is a bit ambiguous, though I have found a great, handy diagnostic article that addresses your issue, and includes to probable causes (a. deposit buildup and b. solenoid malfunction):
http://yourhandymanzone.com/Your_Handyman_Zone_How_To_Pages_Vehicle_Car_Zone_Cars_Trucks_Vans_Transmission_System_Passing_Gear_Fails.htm
This should help!
Brad

hi fro uk this is a common problem on many cars not just hyundai and ita most common cause of synchro mesh failure on2nd and 3rd gear is believe or not a bad driving habit! it goes like this when you set off in 1st then cange up 2nd gear whilst accellerating holding gearstick? in back position then change up 3rd gear still holding gearstick! in a forward position then? when up to 4th gear we let go of gearstick?? now just by holding g/stick whilst in 2nd and 3rd the slightest pressure also brings the synchro ring into play whilst gear already selected! so inevitably the synchro ring wears away to extent that they no longer work properly so the gearbox is none synchromesh on 2nd 3rd gears and on occasions? on 5 speed box 4th gear can become a victim ? hope you understand ? just quietly observe some peoples habits with manual boxes? as for repairs?cost? this is not a difficult job to replace all synchro rings but box has to be stripped and assesed ? the cost could escalate? but if you want quick turnround? a matter of hours? a recon box with warranty? is other option ? BUT would not advise risking a 2nd hand box probably worse or same as ? whichever choice you take you can check clutch at same time if milage is high? now some good advice! personally this is not a dire problem just a niggleproblem which if you take time in changing gears you can o/come gritty gear change save money for now till it is more affordable ? if you know any old timers truck drivers ? these are the guys who will show you how to drive /change gears none synchro mesh before it was ever invented ? hope this helps daughter but practice on gears and rid of the bad driving habit so many do not realise they have will make her a better experienced!driver