So what you are interested in.. you mean specific mechanical problems or some situations in the industry as a whole?? anyway you can do a research about why toyota vehicles are so popular and why people are afraid of buying europian or German cars when they are way luxurious and while the 2nd hand price is also so low.So you could do some analysis about sri lankan people perception ,what they are afraid of??and why this happening sort of..and also why sri lankan people could sell their 16-20 year old vehicles at a price more than they brought it ,make recommendation to the industry as well.Hope that helps