The first couple of seasons the McLaren-Mercedes relationship was difficult, teething troubles with the engine, chassis challenges, and the driver for 1995 was the ageing Nigel Mansell who did not even fit into the car so Mark Blundell deputised. When a revised chassis was produced Mansell's performances were not successful. Mika Häkkinen gradually assumed leadership of the team but suffered severe head injuries in a crash at the end of the 1995 season, from which he eventually made a complete recovery.