If it is a newish car (less than say 4 years) take it to the dealer they will do the check for you. If it is any older then you can take it to the private garage which is on Salwa Road towards the industrial area, do a U-turn at the roadworks and you will find two garages ( german and one other) next to each other. apprx distance of about 200 meters from the roundabout. good luck