I’m having an odd issue with one of my cars (a 2006 VW Jetta TDI).
It starts and drives normally, no lights on dash. But if I drive, shut the car off and then immediately try to restart it, it will barely crank. Sometimes will crank enough to start the engine, other times not. But if I let it sit for a while, it cranks and starts fine.
I haven’t timed it to see how long it takes to “recover” but certainly in a few hours it’s back up to full cranking speed/power like nothing happened.
Any idea what could cause this? I mean it’s almost certainly a bad battery but how does a battery magically recharge itself with the car off?