BusMercedes Benz O403 Dealer Fix & Retarder Sound 1.31 June 21, 2018 - Leave a Comment Mercedes-Benz O403 is fixed for version 1.31.x – Retarder sound fixed – Kamil Koç skin injected – Skin Names fixed You can purchase this bus from all of the dealers. Credits: deTbiT 5/5 - (1 vote) Download mod File File size O403_dealer_fix 706 KB Share mod: