What actually moves your quote: size, method, access and timing
Four variables explain almost the entire AED 30–120 range. First, vehicle size: a Yaris and a Land Cruiser are different jobs, and most vendors price SUVs and 4x4s roughly AED 10–30 above saloons because panel area, wheel size and interior volume are all larger; vans and seven-seaters sit at the top of the band.
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.