diff --git a/addons/fleet/fleet.py b/addons/fleet/fleet.py
index 0e0c08e30eb..483f989fcde 100644
--- a/addons/fleet/fleet.py
+++ b/addons/fleet/fleet.py
@@ -77,7 +77,7 @@ class fleet_vehicle_cost(osv.Model):
         'name': fields.function(_cost_name_get_fnc, type="char", string='Name', store=True),
         'vehicle_id': fields.many2one('fleet.vehicle', 'Vehicle', required=True, help='Vehicle concerned by this log'),
         'cost_subtype_id': fields.many2one('fleet.service.type', 'Type', help='Cost type purchased with this cost'),
-        'amount': fields.float('Total Price', help="Cost that is paid only once at the creation of the contract"),
+        'amount': fields.float('Total Price'),
         'cost_type': fields.selection([('contract', 'Contract'), ('services','Services'), ('fuel','Fuel'), ('other','Other')], 'Category of the cost', help='For internal purpose only', required=True),
         'parent_id': fields.many2one('fleet.vehicle.cost', 'Parent', help='Parent cost to this current cost'),
         'cost_ids': fields.one2many('fleet.vehicle.cost', 'parent_id', 'Included Services'),
diff --git a/addons/fleet/fleet_view.xml b/addons/fleet/fleet_view.xml
index 25bc62fe798..f3f101ba9bf 100644
--- a/addons/fleet/fleet_view.xml
+++ b/addons/fleet/fleet_view.xml
@@ -244,7 +244,7 @@
                                 <field name="fuel_type" />
                                 <label for="co2"/>
                                 <div>
-                                    <field name="co2" class="oe_inline"/> Unit
+                                    <field name="co2" class="oe_inline"/> g/km
                                 </div>
                                 <field name="horsepower" />
                                 <field name="horsepower_tax" />
@@ -410,7 +410,7 @@
                             <group string="Contract details">
                                 <field name="vehicle_id" on_change="on_change_vehicle(vehicle_id)"/>
                                 <field name="cost_subtype_id" required="1" domain="['|',('category','=','contract'),('category','=','both')]"/>
-                                <field name="amount" string="Activation Cost"/>
+                                <field name="amount" string="Activation Cost" help="Cost that is paid only once at the creation of the contract"/>
                                 <label for="cost_generated"/>
                                 <div>
                                     <field name="cost_generated" class="oe_inline" attrs="{'invisible': [('cost_frequency','=','no')]}" />