Those tires are quite a bit larger diameter (31") than stock (29"). From what I recall about the e70 suspension I think the tire shop means the tire is touching the upright hub carrier where it attaches to the upper triangle. To avoid that it would require quite a wide spacer. I used 20mm spacers on the front of my E70 and that was fine but I think it would need more than that.

__________________
2003 4.4i black ext./black int./black headliner (kid's runabout)
2014 535d X-drive, M package, silver/black interior

Sold but not forgotten:
2009 E70 35d, black ext./black int./black headliner (sold 2021)
2006 4.8iS Le Mans blue/cream int./black headliner, SOLD in 2012 sadly...

Other hardware:
2015 Cayenne S (wife's new DD and definitely wroooommmmm)
2016 Tundra 1794 edition crew cab, luxo hauler
2005 Tundra crew cab, weekend hauler. Sold after 150k very happy miles.