Golf Mk V TDI is now over three years old, but has been serviced as per the manufacturers recommendations since new. However, over the last month or so I have niticed a difficulty in starting. It has not failed to start, but it seems to take a lot longer than when it was new - probably have to turn over the engine for five seconds or so. It also coughs a bit when it's turning over.

The Multivan, which is the same age, and has done more Kms doesn't have this problem, and starts immediately.

I'm not sure how the starter system works, so have no idea what could be wrong. Anyone have any thoughts?

Cheers,

Rod