4.Where a Member State makes use of the second subparagraph of Article 17 (6) and of Article 17 (7) of Directive 77/388/EEC to restrict the exercise of the right to deduct, the VAT own resources base may be determined as if the exercise of the right to deduct had not been restricted.The preceding subparagraph shall apply, in relation to the second subparagraph of Article 17 (6) of Directive 77/388/EEC, only in respect of the purchase of petroleum products and passenger cars used for business purposes, and of expenditure relating to the leasing and hiring and also the maintenance and repair of such cars.