I recently purchased a set of H&R lowering springs for my new C-Class. The drop is about 1' gap between the fender and the wheel in the front. The rear has less than a 1/4' gap. I have 19x9 Carlsson 2/5 brilliants in the rear and they rub with passengers in the back. I was wondering what size pads I should use in the rear to raise it about 1/4-1/2'. I was told this is possible. Right now they are the OEM pads. Any assistance about these pads would help. Thank you in advance.