Where is the fuse box on 1983 Mercedes 300d?

OPEN THE HOOD.LOOK AT THE LEFT SIDE FIREWALL (DRIVERS SIDE) AND YOU WILL SEE TWO KNOBS.THESE UNSCREW TO REMOVE THE FUSEBOX COVER.YOU WILL HAVE TO WIGGLE /TIP IT JUST RIGHT TO GET IT OUT. IF YOU DON'T KNOW HOW OLD THE FUSES ARE REPLACE THEM ALL. IF THEY ARE OLD THEY WILL GIVE YOU GRIEF.THESE TYPE OF FUSES CORRODE WITH AGE AND CAN BE INTACT BUT HAVE HIGH RESISTANCE.