Vacuum pump rebuild kit or whole new pump

So I took my car into an MB dealership to have my window switches replaced. One was broken by a friend and I needed to get it fix in a hurry since the window was down.

MB performed a 27 point inspection and said my brakes were hard and I needed to replace the vacuum pump. Which is costly.

My power locks all work fine (doors, gas door, etc.) I do notice my brake pedal is a bit hard but not anything crazy.


I was wondering if anyone has rebuilt their vacuum pump using the kit on diesel giant. If so, was it an easy job?

What should I be checking (e.g. what lines and connectors) before I make the decision to rebuild or replace the pump?

Thanks