Wagner Tuning Radiator Kit Mercedes-Benz A45 AMG CLA45 GLA45 | AustraliaCompetition Radiator Kit for the AMG A 45, CLA 45 and GLA 45 Mercedes Benz A 45 AMG (since 2013) Mercedes Benz CLA 45 AMG (since 2013) Mercedes Benz GLA 45 AMG (since 2014) The 2. 0L M133 turbo engine of the specified A Class models from AMG is equipped with an indirect charge air cooling circuit. So the cooling of the charged air is not realized by the ambient air as cooling medium (as usual), but made with its own cooling water circuit. A reduction