A little troubleshooting help if i may...

[eltax91]

Hi all
I have been to view a possible replacement daily today. A Mazda6 diesel. It was a private sale.

When I arrived, the car would not start. It just clicked, indicating to my logic the battery was flat. The guy said it had been stood for one week.

It went easily with a jump pack and 3 miles into the drive I switched the car off and it started again no worries!

So, from that limited info, Duff battery? Or possibly more to it?

[Monty Python]

I wouldn't expect a battery to go flat after just a week of standing unless (a) the battery is knackered or (b) the alternator hasn't been charging it properly or (c) there's something draining the battery....

[littleredrooster]

...or it's been repeatedly started and stopped by prospective buyers and had the doors opened endlessly so the battery has become drained.

[GAjon]

There must be thousands of these for sale, why bother with one that won't start for a test drive?
Its a reflection of how the car has been looked after, walk away.

[Bonefish Blues]

Isn't it this engine that has had significant "issues" with its fuel pump.