@media (max-width:617px) {
#logo {
/*width: 15px; */
width: auto;
height: 75px;
} 
#logo img {
padding: 5px;
/*width: 15px; */
width: auto;
height: 75px;
}
}

@media (min-width:618px)
{
#logo {
margin-top: 10px;
margin-left: 50px;
width: 314px;
height:100px;
}
#logo img {
width: 314px;
height:100x;
}

.nav-toggle {
background-image: url(http://www.das-tagungshotelportal.de/wp-content/themes/Bentuestu/img/hamburger.png) !important;
}