I have just posted this on the Audio forum.
"1993 SL500 (Black on Black)
Have any members upgraded their audio system? I have the original factory eqt however my daughter ripped the lid off the tape cassette holder (between seats) so I decided it was time to remove the holder and I now have an empty hole there and not sure what to do with it - It looks like it might be a good place to store CD's ( or a drink holder).

Now I would like to also upgrade the sound system and speakers as well and do any members have any recommendations for US/CDA installation?"

Can any members make any suggestions what to do with this empty hole I now have?

Also, my same daughter open the pass side vanity and the cover flap snapped off ( whilst I was trying to figure out how and what excatly snapped - I did the same with the drivers side). Now I have 2 sun visors with no flaps over the mirrore. Can these be repaired or would I have to search for new sun visors and it seems that the hinges are built into the sun visor?

Thanks for any help