 
				
	| 2010 Mercedes-Benz ML350 Bluetec 4Matic 3.0L MIL Lamp on This vehicle came in recently one month ago with the 20b91B code only. Diagnosed it needing a "Adblue" pressure line/heater(were told line has heater built in). At the time we were told this part was not available, the dealer recommended replacing the "adb... 
                        
                            FIX posted 10/31/2019
                               
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 | Message Closed 
 | 
| VIN | 4JGBB2FB9A | 
| Engine | 3.0 L / 6 cyl / DIESEL | 
| Trans | 7-speed Automatic (Electronic) | 
| Delivery | Fuel Injection / common rail direct injection | 
| Emissions | OBD-II Compliant | 
| Symptoms | MIL Lamp On | 
| Occurs | Always | 
Trouble Codes
| 20B91 | 20B91B The output for the heating element for pressure line AdBlue has an electrical fault or open circuit | 
| 20BA1 | The output for the heating element for pressure line AdBlue has a malfunction | 
Message Closed
            
             Vehicle Data
 Vehicle Data
                2010 Mercedes-Benz ML350 Bluetec 4Matic
| VIN | 4JGBB2FB9A | 
| Engine | 3.0 L / 6 cyl / DIESEL | 
| Trans | 7-speed Automatic (Electronic) | 
| Delivery | Fuel Injection / common rail direct injection | 
| Emissions | OBD-II Compliant | 
| Symptoms | MIL Lamp On | 
| Occurs | Always | 
Trouble Codes
| 20B91 | 20B91B The output for the heating element for pressure line AdBlue has an electrical fault or open circuit | 
| 20BA1 | The output for the heating element for pressure line AdBlue has a malfunction | 
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