new purchase

I recently bought a 2004 ML350 which quite old and was told the radio did not work. I was playing with it and it came on and played for about 3 days and went silent about a wee k later it played again and now nothing. I am thinking of buying an after market radio with gps.The car came with empty navigation cd case which makes me think it may have GPS. Is there a way to tell? When the radio did work it does have the slot for CD. Any information will be a help. Thanks

I recently bought a 2004 ML350 which quite old and was told the radio did not work. I was playing with it and it came on and played for about 3 days and went silent about a wee k later it played again and now nothing. I am thinking of buying an after market radio with gps.The car came with empty navigation cd case which makes me think it may have
GPS. Is there a way to tell? When the radio did work it does have the slot for CD.
Any information will be a help.
Thanks

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