Car is a 2.0 TDI 2004 119000 miles.
A handfull of times on cold starts my car has hesitated to start and gave me 2/3 beeps (the sound it makes when you need to fill up with fuel). Also if the radio is on it turns off and I have to turn it back on.
I do notice that the glow plug light stays on until it starts and also the dash lights dim a bit.
So I am thinking either battery or glow plugs? Does that sound about right or am I barking up the wrong tree?