M-Class (W166) Produced 2012-2015

Keep fluid in after AdBlue delete?

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Old Jul 30, 2024 | 06:39 PM
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HumW166's Avatar
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From: England, UK
2012 Mercedes ML250 Bluetec Special Edition W166
Keep fluid in after AdBlue delete?

I had an AdBlue, DPF & EGR delete + Remap done in June 2023. It just occured to be that I'm not sure if the ad-blue tank was drained or not.

Should it be drained after the delete or, should it instead be filled?

Assuming I don't want to remove the AdBlue tank..

Last edited by HumW166; Jul 30, 2024 at 06:43 PM.
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Old Jul 31, 2024 | 10:27 AM
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tonyl13's Avatar
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From: Sonoita Arizona
ml350 bluetec
I would drain it just added weight, it will go bad after seting for a long time
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Old Jul 31, 2024 | 09:36 PM
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rapidoxidation's Avatar
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From: In the Shadow of the Tetons
2013 ML350 Bluetec
If you ever want to have a prayer of going back to non delete, you'll want the tank COMPLETELY empty and clean. Really can only do that by removing the tank and all the associated plumbing, then plugging the injector hole in the exhaust pipe. If you're not worried about going backwards, drill a hole in the tank and call it good.
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