Hi Tom,
I finally found a solution to my problem.
It was not only a problem of the the Flexslider. There is something with the framework that is generating each time a section.
.flexslider {
width: 100%;
height: auto;
}
.flexslider .slides img {
width: 340px;
height: auto;
}
.flex-control-nav,
.flex-control-paging,
.flex-direction-nav {
display: none;
}
.vehicle-details .grid-70 {
float: left;
padding: 0px !important;
width: 55%;
}
.vehicle-details .grid-30 {
float: right;
width: 45%;
margin-top: -280px !important;
}