NHTSA Complaint #11545318 — 2021 MERCEDES-BENZ SPRINTER 2500

The car is in a warranty. I was to The Mercedes (Rockin California)service and they said Break front pads needs to replace 16,000 miles.I did service replace the front pads,and after that I had a lot a pulsing on the break pedal.I was back to Mercedes service(Rockin California ) to explain what happened with my brakes,and they said ‘’you need to replace the rotors disk and the new pads.I refused that.I was at second opinion to another mechanic and he said is issue about hydraulic problem,And safety.Another thing they did tire rotation (I do Not approval to do tires rotation ). I m scare about my safety driving. I need help to fix my car because I m using this car for my business in construction. Thank you .