Uber made a formal €13 billion offer to take over Delivery Hero. The move appeared in a filing with investors. The aim is to expand Uber’s services beyond solely ride-hailing. Delivery Hero agreed and described the plan as part of its own effort to diversify. Bosses mentioned plans to merge food delivery with ride-hailing, but provided few updates on savings. Analysts warned the scale of the deal could create problems. They pointed to tough integration and questions over whether the valuation is fair.