all the hotels are either nestled in the same area or equally good place along the ring. location its absolute wash. if its a single night stay is there a real difference in property quality? if i were you id just get whichever brand is preferred or have loyalty affiliation with.
for transport curbside taxi is around 45 eur and uber is 30 eur, 20-25m ride, and most likely in mbz e-class.