But the data labels on top of the charts

Hello, Cedric,
 
Thank you for writing to us. 
 
The chart labels can be shown by specifying the showDataLabels chart option, for example:

options: {
  chart: {
    showDataLabels: true
  }
}

Here is a JSFiddle example for illustration: https://jsfiddle.net/flexmonster/bq5ndutf/

We would like to mention that for a pie chart, only the labels that can be shown without overlapping will be displayed. If you desire to show all labels on the pie chart, this can be done by setting the showAllLabels chart option to true.
 
Please let us know if this helps.
 
Kind regards,
Vera

Hello, Cedric, 
 
Thank you for your reply and for providing your report configuration.
 
We have noticed that the options object is specified outside of the report object in your configuration.
Please kindly note that the options object is part of the report object, hence, please try specifying it the following way:

vehicleFlex = new Flexmonster({
   ...
   report: {
      dataSource: {...},
      options: {
         chart: {
            showDataLabels: true
         },
         grid: {
            type: "classic",
            showTotals: false
         }
      }
   }

   ...
});

For more information about the report object's structure, please see the following guide.
 
Please let us know if this helps.
 
Waiting for your response.
 
Kind regards,
Vera