leaking in tocabin

Hi i have not posted for a while. Due to w116 running very well.
car has sunroof and the rain we are having at the momment is causing water ti come in near the accelarator pedal. Aussie car so is rhd. seems to be comming from kick plate then onto floor. water comming in from the side rather than front firewall. Now onto the roof small rust area rhs on main roof.(not sunroof panel)
water most likley comming in that way?. Thanks in advance for your help information.