Updating database in Laravel using eloquent

I have a blade for a car sale system contains selections form inputs. I am trying to insert what is selected from the drop down selection but i get an error i do not know why.

 <div class="form-row">
     <div class="form-group-lg col-md-4">
     <label>MAKE</label>
     <select  name="model" class="form-control"  required autofocus >
     <option selected>choose...</option>
     <option value="Toyota">Toyota</option>
     <option  value="Mercedes">Mercedes</option>
     <option value="Subaru">Subaru</option>
     </select>

     </div> 

How can i insert the above selected item using eloquent in laravel

via Chebli Mohamed