M-Class (W166) Produced 2012-2015

adblue ml 250

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Old Feb 7, 2020 | 11:56 AM
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Georgio30's Avatar
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ml250
adblue ml 250

Hello
I have a ml 250 in 2012 and have received warning for adblue refilling.
Filled with 20 liters of adblue but I still have the error and even the engine light is on. Do you have any tips?
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Old Feb 8, 2020 | 09:15 AM
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Can you scan the vehicle with a code reader, ideally a specific Mercedes STAR or DAS/Xentry system?

An engine light by itself doesn't provide much information. Please search this site, there is a large volume of information related to DEF, AdBlue, BlueTEC, and many other diesel-related problems. Unfortunately.
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Old Feb 10, 2020 | 01:48 PM
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Originally Posted by chassis
Can you scan the vehicle with a code reader, ideally a specific Mercedes STAR or DAS/Xentry system?

An engine light by itself doesn't provide much information. Please search this site, there is a large volume of information related to DEF, AdBlue, BlueTEC, and many other diesel-related problems. Unfortunately.
in addition to what @chassis said, how old is your car, is it still under warranty?
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Old Apr 29, 2020 | 09:46 PM
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ML350 Bluetec 2014
Seems you need to top off the DEF to help prime the DEF pump. How much volume is your DEF tank? The DEF tank for ML350 is around 27 liters and I had topped to get rid of the engine light. Also may need to drive a few more miles.

Last edited by RiverX; Apr 29, 2020 at 09:48 PM. Reason: Add more information
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