My 1.9 TDi Alhambra is similar. Light on for a moment [part of self-check on start-up] and cranking for compression to get her running. Suspect relay in glowplug circuit. But how to reach the relay is a problem. Four screws release part of trim; another screw and clips at the sides release the fuse block and relay frame, but it fails to drop far enough to reveal the relays. Have you got that far, and could you get to the relays ? Another posting [on Sharan forum I think] said one owner had fitted another relay and fuse under the bonnet to improve matters. Sounds like a good idea; may yet try that. Cheers, John. :)