does your car have a check engine light on ?
and how many miles are on your Murano?
let me know if you need help Thank you ROY!
I think you could have 2 different problems . the transmission is not engaging in foward sounds like a transmission problem , your transmission is still under factory warranty until 120k miles . I would heve it check you could need a new transmission . and the battery could also be bad or have a draw on the system from a short .
Let me know if you have any more questions, Thank you , ROY!