Towing with a Mercedes GLC 220d

After 6 good years with of towing with a Mercedes E250 Sport Estate I am looking for a change. I am looking at the possibility of a pre-owned Mercedes GLC 220d with the 190ps engine, but what I do not want to do is to lose is the Air Suspension which is a standard feature on the rear of the E250. I have searched and searched but can find which spec has it as standard, even though one site said it was standard, it is never mentioned in any ads for a feature of the GLC.

 If you tow with a GLC I would like very much to hear your opinions about this model as a tow car.

 The model year I am looking at is 2019, I would prefer not to have 20 inch rims, 18 inch would be my preference as I am sick of the ride and road noise of ultra-low profile tyres.