it worked, i found a video on youtube on how to install firmware, it had a link to firmware, burnt it at 10x speed, chucked the disc in, no ignition, just press button with everything off... it worked. i now have sound, was able to change language to english and didnt lose any maps. its perfect. so happy. thank you all for your help so far.
this is the link i used. RNS_510_FW_5238_update_modified.rar - Google Drive
version 5238. good luck to all that need the file!
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