eiru_car_services/views/project.xml

<?xml version="1.0"?>
<openerp>
    <data>
        <record id="project_car_form_view" model="ir.ui.view">
            <field name="name">project.car.form.view</field>
            <field name="model">car.car</field>
            <field name="inherit_id" ref="eiru_base_for_services.car_car_form"/>
            <field name="arch" type="xml">
                <group name="extra_info" position="inside">
                    <field name="date_in" string="Fecha de entrada" attrs="{'required': [('state','!=', 'draft')],'readonly': [('state','=', 'close')]}"/>
                    <field name="date_out" string="Fecha de salida" attrs="{'readonly': [('state','=', 'close')]}"/>
                </group>
                <field name="name" position="replace">
                    <field name="name" placeholder="Vehiculo" attrs="{'readonly': [('state','=', 'close')]}"/>
                </field>
                <field name="partner_id" position="before">
                    <field name="policy" string="¿Entra por medio de seguro?" attrs="{'readonly': [('state','=', 'close')]}"/>
                </field>
                <field name="partner_id" position="after">
                    <field name="agent_id" string="Agente de seguro" attrs="{'invisible': [('policy','=', False)],'readonly': [('state','=', 'close')]}"/>
                </field>
            </field>
        </record>
    </data>
</openerp>