FREE wiper blades!!! If you own a Mercedes 2010-2013 C, E, M, S and GLK model, you can get a free set of wiper blades at participating Mercedes dealerships. Offer good until April 1, 2017 or while supplies last. You must do the complimentary vehicle Multi-Point Inspection at a participating Mercedes-Benz dealership to be eligible for this offer. Must present at time of visit to receive offer. One-time use only.