Showed 1.7 volts (the hood light did come on

) .... now charging @ 3.9....
Hoping
Crap .... old/good DieHard charger & starter just started flashing 8 8 8 ... or something.... no bueno
Now how do I even get the rear hatch open to access the battery?
Anybody wanna Macan .... ran fine three months ago .... once