Check if it downshifts are good. If that's ok, there is probably no problem with transmission. Cruising at the speed of 60km/h, press the accelerator to the floor in a friction of second, car should downshift two gear, or one, depends upon the harshness u delivered to the padel
Check if D lite keeps on blinking while driving, if yes, there is some problem in transmission.
Watch for check lite turns on during driving or not. If not, then fine.
Take the car to rush area and check with AC if it heats up or not. The needle should remain at the same place, not even it should go 1mm up, if needle tries to move with AC, heating up problem is there.
Before starting check the level of engine oil and coolant.
Go to a highway, drive upto 120km/h for atleast a couple of minutes and come back. park the car. open the cap where we put engine oil and check if any fumes or smoke coming out of that, if yes, there is problem with engine.
Check for oil level again, if it's reduced, there is a problem
After all those trips, check coolant level in radiator, if its low, gasket may b bad.
Check for Power steering fluid level, It should not be low. If it is, there may b leaks in steering box or power steering system.
Lean under the car to check for any sort of leaks. Freshly serviced and oiled car would never give u idea of underside. If possible, service the car but don't let them spray oil or diesel down under or on the engine. keep them dry and u can judge for the leaks only after this.
Suspension of this model is quite harder, so don't get bothered.
Two main problems in this specific shape/model are transmission and power steering pump. Check them both critically