2013 WINNEBAGO ERA Electrical System Problems

THE VEHICLE DOES NOT HAVE A "TIRE PRESSURE MONITORING SYSTEM". I RECENTLY PURCHASED A NEW DUAL-WHEELED-AXLE (I.E., 4 WHEELS ON ONE AXLE) RECREATIONAL VEHICLE (RV) THAT WAS MANUFACTURED IN TWO STAGES BY TWO SEPARATE WELL KNOWN MANUFACTURERS. THE CHASSIS WAS MANUFACTURED BY MERCEDES-BENZ AS A MODEL SPRINTER 3500 HAVING A 11,030 LBS GVWR. THE SECOND MANUFACTURER WAS WINNEBAGO WHO MODIFIED THE CHASSIS TO EQUIP THE UNIT AS THEIR 2013 WINNEBAGO MODEL ERA 170A CLASS B RV. I PURCHASED THE NEW 2013 WINNEBAGO ERA 170A FROM A SELLER OF NEW WINNEBAGO RVS. THE CHASSIS MANUAL AND VEHICLE PLACARD STATES THAT IT IS DESIGNED FOR A GVWR OF 11,030 POUNDS. THE RV, AS OUTFITTED WITH THE FULL WEIGHT OF FLUIDS AND TWO PASSENGERS, HAS A CERTIFIED WEIGHT OF 9,280 POUNDS (3,760 LBS STEERABLE AXLE AND 5,520 LBS REAR AXLE). IF LOADED WITH ANOTHER 720 POUNDS OF CARGO, NOT LIKELY, THE RV WOULD...