To my understanding non is required here if you are driving in Doha. Technically this country does not need a car with more than 2.0Litre engine with signals eveery 0.5 Km. If you are in Oman, UAE & Saudi then it matters to keep and make use of them. Car with 1.8L is more than enough for Doha. You want to show than can even buy a BMW or Lexus or etc.