What actually moves your quote: size, method, access and timing
Second, method. Waterless product is cheap per car; steam machines cost thousands of dirhams and slow the worker down — expect steam to add AED 20–50 over a waterless equivalent. Third, access: a tower basement with sign-in and service lifts adds unpaid minutes to every job, and vendors who work towers price that in. A villa driveway is the cheapest address to serve.
Fourth, timing and frequency. A one-off Saturday-morning booking after a dusty week is the most expensive way to buy this service. A weekday slot, a recurring schedule, or two family cars in one visit all pull the effective per-wash price down — often to AED 25–45 on a monthly plan versus AED 40–70 ad hoc. When you compare vendors on tamam, which shows multiple verified providers with AED ranges rather than one fixed rate, these four variables are what you are actually comparing.