Displaying a ManyToMany Field

I am trying to display manytomany field in my template, but all I get is blank ... I am displaying it like below:

{% for vehicle in vehicle.features.features %}
   <li>vehicle.features</li>
{% endfor %}

      

        
        
        
      

    

My model looks like this:

class Vehicle(models.Model):
   stock_number = models.CharField(max_length=6, blank=False)
   vin = models.CharField(max_length=17, blank=False)
   common_vehicle = models.ForeignKey(CommonVehicle)
   exterior_colour = models.ForeignKey(ExteriorColour)
   interior_colour = models.ForeignKey(InteriorColour)
   interior_type = models.ForeignKey(InteriorType)
   odometer_unit = models.ForeignKey(OdometerUnit)
   status = models.ForeignKey(Status)
   odometer_reading = models.PositiveIntegerField()
   selling_price = models.PositiveIntegerField()
   purchase_date = models.DateField()
   sales_description = models.CharField(max_length=60, blank=False)
   feature_sets = models.ManyToManyField(FeatureSet, blank=True)
   features = models.ManyToManyField(Feature, blank=True)

   def __unicode__(self):
      return self.stock_number

      

        
        
        
      

    

The classes I am linking to include:

class Feature(models.Model):
   name = models.CharField(max_length=32)
   type = models.ForeignKey(FeatureType)

   def __unicode__(self):
      return self.name

class FeatureSet(models.Model):
   name = models.CharField(max_length=12)
   features = models.ManyToManyField(Feature)

   def __unicode__(self):
      return self.name