The factory DEF heater on certain vehicles often fails from fluid intrusion. This Dorman OE FIX solution modifies the OEM design to address this failure point and increase reliability.

Diesel Exhaust Fluid Heater 904-375 Features:

• Fits 2007-2009 Mercedes-Benz Ml320; 2015 Mercedes-Benz Ml350; 2010-2011 Mercedes-Benz; 2015 Mercedes-Benz Ml400
• Upgraded replacement — this diesel exhaust fluid (DEF) heater features additional protection from fluid intrusion
• Restores performance — designed to match the fit and function of the original equipment part
• Thoroughly tested — each design undergoes cyclical heater element fatigue testing
• Trustworthy quality — backed by team of engineers in the United States