RON, SOME OF THE MAHINDRA TRACTOR MODELS COME WITH A METAL BLOCK IN THE LOWER RADIATOR HOSE, TO INSTALL THE HEATER ( 05 SERIES, C SERIES, 25 SERIES). I INSTALL BLOCK HEATERS IN EVERY 00 SERIES, 20 SERIES, 25 SERIES, C SERIES, AND 05 SERIES, TRACTORS I SELL, BECAUSE I KNOW THEY WILL BE NEEDED. THE 10 SERIES AND 15 SERIES, WITH COMBUSTION CHAMBER GLOW PLUGS, HAVE NEVER HAD ANY COLD STARTING PROBLEMS. I REALY DON'T FEEL THE BLOCK HEATER IS NEEDED. GOOD LUCK. IF YOU HAVE ANY QUESTIONS FEEL FREE TO CALL ME, MY NUMBER IS 585-343-0770