Saad Aziz

hello everyone, i have just signed up on this forum. i currently drive a toyota corolla E140 and i’m deciding to shift to mercedes benz w203. i wanted to ask a few questions before i actually make this move
1) how different will it be on my pocket compared to a corolla on monthly basis?
2) what things should i keep in mind before i buy this car? (have a few good pieces short listed)
3) will it last for another 10 years if maintained and driven well?
4) i am from pakistan, what further things have to be kept in mind considering our tough climate conditions?

thank you people!