Following up from this thread, http://www.vectra-c.com/forum/showthread.php?t=150134 I have now put in new bosch 5007 battery (with a higher cranking power) into the car and it starts on its own though still takes some cranking at times and spanner light still on with key at ignition but goes off once car starts.
Another problem now is that I observed engine area as in the pix below now has brown dust like it has been driven through untarred road. Can someone suggest what could have caused this please? Could this issue be related to the starting problem I have at the moment? Thanks.