Mercedes-Benz Sprinter Adblue Tank Heater Replacement

Need to replace your Mercedes-Benz Sprinter Adblue Tank Heater? Learn how to replace the AdBlue tank heater by following the procedures below. A failed tank heater usually shows up as an AdBlue or DEF warning with reductant heater codes, and on many vans a countdown of remaining engine starts. The cause is typically a faulty Diesel Exhaust Fluid (DEF) heater or pump.

What you will need

• Mercedes DEF Heater
  • Bosch makes an OEM Mercedes DEF heater.
• Basic tools
  • 3/8″ Ratchet
  • 10mm socket
  • Screwdriver
  • Hammer
• 3/8″ E14 Socket
• 4mm hex bit

Procedure

1. Park the Mercedes on level ground and let it cool down.
2. Locate the DEF tank. On Sprinter vans, it is below the sliding door on the passenger side. The BlueTec tank is in several models’ trunk or engine bay.
3. Remove two brackets that hold the DEF tank secured to the body.
4. Have a helper keep the DEF tank up while you disconnect all the hoses and wires from the tank.
5. Remove the DEF tank from the car and disconnect all the electrical connectors and hoses from the DEF heater and pump.
6. Remove all 4mm hex bolts that secure the pump to the DEF heater.
7. Remove the DEF pump from the DEF tank (top of the DEF heater). Remove the large locking ring from the DEF heater element.
8. Remove the DEF heater element from the tank.To disconnect the inner heater part from the tank, you will slide your hands inside the tank and the plastic counterclockwise.Mercedes DEF tank removed.
9. Install the DEF pump and heater element. Several O rings will most likely come with your new DEF pump. Make sure to replace them, including the one that connects the pump to the heater element.
10. Tighten the lid locking ring. Make sure the mark on the ring matches the ring lineup on the tank mark.
11. Install the DEF tank on the vehicle. Add DEF fluid to the top of the tank.
12. Lastly, an OBD2 scanner is used to clear the check engine light. If the problem is no longer present, you could drive the vehicle, and the CEL will clear. We recommend clearing the code with a Mercedes Star Diagnostic scanner and monitoring to ensure the CEL doesn’t return.

If your Mercedes BlueTec check engine light is on with a fault code related to the DEF heater, you must fix it immediately. Otherwise, when you ignore the CEL, your Mercedes may go into limp mode, and also, you may start to get a warning message on the dashboard stating ” x starts remaining,” after which point you will no longer be able to start the car, van or SUV.

If you have problems with your DEF system, including the heater element, we recommend calling a Mercedes-Benz dealership near you and checking any open recalls. If there is an open recall, your dealer will fix the problem under warranty. A Federal mandatory warranty covers all emissions issues up to 80,000.

You may have been quoted to replace the DEF tank, heater, and pump altogether, which can cost as much as $4000 at the dealer. Replacing the DEF tank is rarely necessary unless it has developed a crack.

Mercedes DEF Heater Part Numbers

• W164 GL320 GL350 DEF Heater on eBay
  • Replacement F 01C 600 245 / F-01C-600-245 / F01C600245
  • Fitment: 2010 to 2012 Mercedes-Benz GL350 2007 to 2009 Mercedes-Benz GL320
• W166 to 166 471 07 75 / 166 471 08 75
  • F-01C-600-237, F 01C 600 237, F01C600237
• Sprinter: 906 470 03 53 (eBay link) / F 01C 600 228
• W212 to 2124710575
• 2010 to 2013 Freightliner Dodge Springer: F01C600232
• GLK250 Bluetec: A 204 471 05 75

Verify your Mercedes DEF heater part number with the seller or by calling your dealer.

If the Mercedes is out of warranty, you have several options.

• Take it to the dealer and spend anywhere from $1800 to $2500 to replace the DEF heater.
• Second, you can purchase a new Mercedes DEF heater online and replace it in less than two hours.

Why does my Mercedes need a DEF Heater?

All DEF systems require heating elements to prevent DEF fluid from freezing at temperatures less than twelve degrees Fahrenheit. DEF Heating Pots are designed to quickly return DEF to liquid form, ensuring proper flow through the lines and pump unit. A failed DEF heating element is a common culpritif your diesel vehicle operates in limp mode or is not at full power.

The DEF heater consists of the DEF, Diesel Exhaust Fluid Heater, DNOX Heating Unit, Urea Tank, and Adblue Preheater Module.

Related Terms

Mercedes sprinter def heater
Mercedes def tank heater
Mercedes gl350 def heater
Mercedes ml350 def heater
2013 Mercedes Sprinter def heater
2012 Mercedes Sprinter def heater

Mercedes sprinter def heater
Mercedes def tank heater
Mercedes gl350 def heater
Mercedes ml350 def heater
2013 Mercedes Sprinter def heater
2012 Mercedes Sprinter def heater
Mercedes Sprinter def tank heater

Mercedes 20BD1B Code

• The heating element AdBlue tank output has an electrical fault or open circuit.

The YOUCANIC UCAN-II Pro can read and clear codes from all the systems in your Mercedes-Benz. It can also perform various tasks, like bi-directional tests, maintenance and repair reset functions, and many more.

Frequently Asked Questions

What happens if I ignore the Sprinter AdBlue warning?

Many vans count down the remaining engine starts. Once the count reaches zero, the engine may not restart until the fault is fixed.

Why do AdBlue heaters fail?

The heater and pump sit in the tank and go through freeze and thaw cycles, and DEF crystals can damage parts. Heater failures are common on these vans.

Do I need to reset anything after replacing the DEF heater?

Clear the codes and, on many vans, run an adaptation or the countdown reset with a scan tool that supports Mercedes.

Check these troubleshooting and repair guides for more help on your Mercedes-Benz Sprinter.

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