EXT2-fs warning: checktime reached, running e2fsck is recommended
This means that the time since the last FS check has been exceeded. It's harmless.
Tried to mount /dev/hda4 as reiserfs but got error 19
This error is normal. The car player partitions are ext2 so it will always fail to mount as ReiserFS.

You tried deleting the database from the empeg and getting emplode to recreate it?