LEGEND DuraTherm Ceiling Liner Kit ONLY - Dual Side Doors Mercedes Sprinter 170" Extended Wheelbase Cargo Van High Roof - Textured Grey Model 145-114-2613.2LEGEND DuraTherm Ceiling Liner Kit ONLY Dual Side Doors Mercedes Sprinter 170" Extended Wheelbase High Roof Textured Grey Model 145 114 2613. 2 Insulated Ceiling Liner cools down the interior cargo space by creating a thermal barrier and fending off the hot sun, especially in extremely hot weather climates. Underrated, often forgotten, yet easily the most effective product in cooling down the cargo space for operators in the back of the vehicle a lot.