The Allianz insurance company will allow cars in Germany to be repaired with used spare parts, the Munich-based insurance giant said on Friday. Vehicles between three and eight years old are eligible under the scheme, which should make repairs both more environmentally friendly and cheaper, the insurer said. The DAX-listed company and largest German insurer referred to England, the Netherlands and France, where there have already been regulations promoting the use of reusable parts in car repair shops for several years. “All experts agree: repairing is more sustainable than using new parts,” s…