19" Cookie Spare tire
Thanks




What the car won't like is a marked difference in one tyre size as it may throw out the ABS and ESP.
The diff in each axle will take up the slight variation in tyre size as it will think it's going around a permanent corner and allow for it.




They only issued one owner's manual for Ml series, whether it was a ML250, 350, 550. ML from 2012 through 2016 came with different size tires from the factory. 18 for Blue tech engines, 19 as standard on gas and 20 as option. The only issues with spares that I know about are for AMG model which require spare to be mounted on the rear. (They have a different spare called a Mini spare) ML that had Owners manual page 330 gives cautions on spare, ie it do not exceed 50 mph.




