Power steering malfunction caused by computer glitch when we had a bump. Seenhtsa recall #17v-595 for earlier manufactured metris. Yes- available for inspection. Yes, loss of power steering endangered us an anything in our path as we attempted to steer the van without powered steering i don’t know if it can be confirmed by a independent service center, but there is a history of this with other owners and i assumed it can. It has been inspected by a merecedes service center, see the enclosed repair estimate. No warning ,a bell dinged a red service message came on when we hit the bump.