M-Class (W164) Produced 2006-2011: ML280CDI, ML320CDI, ML420CDI, ML350, ML500, ML550

Bluetc - add or not?

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Old Apr 10, 2016 | 05:15 PM
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11 ML350 Blue
Bluetc - add or not?

I have 2011 ML, bought it used with 30k and I'm guessing it was serviced because now at 45k I still haven't added add blue. I thought the light supposed to come one when its low (10k per tank?) but nothing yet. Any thoughts?
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Old Apr 10, 2016 | 05:23 PM
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2023 GLK250, 1987 560SL
Fill it up just in case. I think these have some issues if the run dry.
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Old Apr 10, 2016 | 07:13 PM
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2014 E63 AMG S, 4Runner
Originally Posted by czego82
I have 2011 ML, bought it used with 30k and I'm guessing it was serviced because now at 45k I still haven't added add blue. I thought the light supposed to come one when its low (10k per tank?) but nothing yet. Any thoughts?
I would add some in there. The Adblue tank in the rear cargo bay holds about 7.5 gallons. Each 2.5 gallons of Adblue added will allow you to run about 5-6k miles. I get my Adblue from Home Depot for ~$12 per 2.5 gallon case (marketed as BlueDEF and made by Peak, who also makes antifreeze). Comes with a spout in the box for easy pour. It's compositionally the same (32.5% ultra pure automotive grade urea and the rest is distilled water) as the way overpriced Adblue from the dealer.

http://m.homedepot.com/p/BlueDEF-2-5-gal-Diesel-Exhaust-Fluid-DEF002/204804290?keyword=BlueDEF&searchtype=text

Last edited by amg_w211; Apr 10, 2016 at 07:17 PM.
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Old Apr 10, 2016 | 07:25 PM
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11 ML350 Blue
Originally Posted by amg_w211
I would add some in there. The Adblue tank in the rear cargo bay holds about 7.5 gallons. Each 2.5 gallons of Adblue added will allow you to run about 5-6k miles. I get my Adblue from Home Depot for ~$12 per 2.5 gallon case (marketed as BlueDEF and made by Peak, who also makes antifreeze). Comes with a spout in the box for easy pour. It's compositionally the same (32.5% ultra pure automotive grade urea and the rest is distilled water) as the way overpriced Adblue from the dealer.

http://m.homedepot.com/p/BlueDEF-2-5...earchtype=text
Thank you, so full tank should last 15 to 18k miles. Do you know when the light should come on?

Last edited by czego82; Apr 10, 2016 at 07:35 PM.
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Old Apr 10, 2016 | 07:45 PM
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2014 E63 AMG S, 4Runner
Originally Posted by czego82
Thank you, so full tank should last 15 to 18k miles. Do you know when the light should come on?
Your warning light for low DEF should come on at anytime based on your driven mileage. The amount of DEF used depends on the type of driving you do (freeway vs city vs ambient temperatures, etc). I personally would not wait for the warning message to come on as you'll eventually need to add it (and sooner than later in your case). As a guesstimate, I would add in a minimum of 5 gallons DEF now and then add in 5 gallons every 10-12k of driving. If you overfill DEF, it will just spill to the rear underbody, which you can just hose off.
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Old Apr 10, 2016 | 07:50 PM
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11 ML350 Blue
Originally Posted by amg_w211
Your warning light for low DEF should come on at anytime based on your driven mileage. The amount of DEF used depends on the type of driving you do (freeway vs city vs ambient temperatures, etc). I personally would not wait for the warning message to come on as you'll eventually need to add it (and sooner than later in your case). As a guesstimate, I would add in a minimum of 5 gallons DEF now and then add in 5 gallons every 10-12k of driving. If you overfill DEF, it will just spill to the rear underbody, which you can just hose off.
sounds good. I wanted to burn as much of whatever was in there as lifespan on it is 2 years and I wasn't sure how long its been there and but based that its already at 15k miles, there should be very little left.
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