EQB 350 long range in planning?

My parents did a test ride with the EQB 350 this week (1st time electric) and were very excited. Since the two are around 70, the boarding, sitting and driving comfort are very important, all these criteria are met by the Benz. The EQB 350 would be the ideal car if only the battery were a little bigger. I have only a consultative function, but because of the battery, I can’t quite say a purchase recommendation. Comes in the near future a long range version d there 350? All-wheel is needed here in Austria.