Aston? They've been teetering on the edge for ages. Ford was happy to jettison them. Since 2008 despite the downturn the luxe car market has grown while Aston's share shrunk. DAR bought 51% then ran out of cash in two years. Aston promptly cut 1/3 of its workforce.
Last year a single shareholder kicked in £150m to give them enough cash to try and develop a DB9 replacement.
They went to MB because they could not afford to develop their own engine any longer. That's not a swipe at MB.... maybe it's a smart move. But Aston is cash-poor.