Did exactly that route last month in an EQS 580 from SOS Rent Cars – silent, zero vibration, seats are even better than the petrol S because of the flat floor. Charging at ADNOC stations every 350 km is no drama now. Range showed 620 km real-world with AC blasting. Mercedes fleet here: https://sosrentcars.com/car-brand/mercedes/ – they have the EQS in black with the executive rear package. After 10 days I actually preferred it over the S.