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Old 07-06-2016, 12:46 PM   #91
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Originally Posted by HappyHikeRs View Post
We just filled up for the first time since leaving campground near dealer. Filled up on way home, took 2 short weekend trips and did some driving around town (to acclimate cat to MH). 2401R w/trekker cap - 240 miles, no wind, no toad, flat roads, mostly 60 mph = 15.5 mpg. Hopefully it will improve slightly with break-in and longer trips because I'm getting my car set up for toad duty soon and will head for the mountains, which will surely bring it down some.
We got home from our second four day trip on Monday. I just got around to calculating our mileage. Except for the first 80 miles, which was bring the Sunseeker home for the first time, the motor home has been set up for traveling. This includes food, clothing, camping accessories, 1/3 tank fresh water, 1/3 tank black water and towing a 3000 pound tandem axle trailer.

Over the course of 1400 miles, we have averaged just over 14 mpg. This includes our last northbound trip in which we encountered a 30 MPH headwind the entire way. The mileage for that 250 mile portion was about 10 mpg. On the highway I will run 65 mph with the cruise on whenever I feel comfortable doing so.

Whenever we travel, we will have the tag in tow so I will never be able to provide that 16 mpg that I am quite sure the MB Sprinter diesel is capable of. To get that kind of mileage INMO it will take not exceeding 60 mph, without using the cruise, and anticipating hill climbs by slowly accelerating prior to the climb and then slowing as necessary to keep from downshifting if possible. If a person is capable of always keeping the engine speed within the 1400-2400 rpm torque range, they will get the best mileage.

Although the Cruise Control is probably the best I have used, it does have its downsides that cost fuel mileage. First off it can't anticipate a hill and speed up prior to the climb, then it uses the engine braking capabilities on the downside of that hill to keep the vehicle within the set speed parameters, instead of using the vehicle weight to let you freewheel down the hill and thus gaining distance using very less fuel.
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Old 07-06-2016, 07:03 PM   #92
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Just finished about a 300 mile round trip and averaged just over 14 MPG, not towing anything. Ran between 55-65 MPH mostly about 60 though. All flat roads and not much wind.
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Old 07-07-2016, 07:34 AM   #93
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Currently traveling with my new to me 2015 Solera. Although I didn't weigh it I am sure I am near gross weight. Also towing a open trailer with an 800 pound Harley. On the flat roads of Florida and Georgia at 60-65 mph we got 14 mpg. In the mountains of the Carolinas we got about 13.2.
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Old 07-13-2016, 01:09 AM   #94
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I was just wondering if anyone has run out of fuel and their experience getting on the road again. I just had the near experience of running dry with a blinking low fuel indicator light.
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Old 07-13-2016, 06:09 AM   #95
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I was just wondering if anyone has run out of fuel and their experience getting on the road again. I just had the near experience of running dry with a blinking low fuel indicator light.
What do you mean by "near experience"?

How many gallons of fuel did it take to fill your tank?

The manual states that the MB Sprinter based motor home fuel tank holds approximately 26.4 gallons and the low fuel light is set to go on when there is just over 5 gallons of fuel left. Even at 10 mpg, which is most likely worst case scenario, you would still have close to a 50 mile safe zone.

The time my low fuel light went on, I stopped at the next station, approximately 5 miles later and it took just over 19 gallons to fill the tank. From what I have read here, the general consensus is the low fuel light seems to go on at around the 19 gallon mark.

Remember to check your DEF tank level on a regular basis. Although it is supposed to last approximately 2000 miles, DEF can be had much cheaper when purchasing it at a truck stop DEF pump. Run out of DEF and you will be driving at a snails pace.

The MBS owners manual is really worth reading. Maybe not in its entirety, but at least the important parts, like tire pressure, maintenance schedule, tire change procedure, low fuel warning, fluid capacities and how to check them, etc. and probably the most important.

What to do if you run the fuel system DRY.

The fuel tank has been run dry.
X Refuel the vehicle.
If you drive until the fuel tank is completely empty, air may get into the
fuel system. If the engine does not start after refueling, bleed the fuel
system as follows:
X Turn the key to position 2 in the ignition for approximately
10 seconds.
X Start the engine continuously for a maximum of 60 seconds.
If the engine does not start:
X Wait approximately 2 minutes.
X Restart the engine continuously for a maximum of 60 seconds.
X If the engine still fails to start, do not continue trying to start it.
X Consult a qualified specialist workshop.

Here is what happens when you attempt to start the Sprinter after the DEF light goes on

Three short warning tones also sound.
After the message appears for the first time, the remaining DEF supply
will last for approximately 1200 miles (1900 km). The engine can then
only be started another 16 times.
The number of remaining engine starts xx (16 to 0) is shown in the
message every time the engine is started.


It is really amazing all the information that Mercedes Benz felt was important. What is even more amazing is how few new vehicle owners ever take the time to read that important information.
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Old 07-13-2016, 03:06 PM   #96
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Perhaps a new thread is in order, but I've got almost 4,000 miles on my W so far and the DEF light hasn't even come on. The gauge shows that I'm about 1/2 full. Curious if that's the same for others because it contradicts the previous post above about it lasting only 2,000 miles?
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Old 07-13-2016, 03:16 PM   #97
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Mbs 2401 r

I now have about 3000 miles on mine with no warnings of DEF. I filled this weekend and it took about a quart and a half.

I am new to Diesel engine operations and DEF was unheard of before I bought this rig. I think it does warrant a separate thread. It is unrelated to fuel consumption and I would guess many know nothing about this additive.

Who wants to start one?
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Old 07-13-2016, 11:47 PM   #98
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Originally Posted by Aspenmeadow View Post
I now have about 3000 miles on mine with no warnings of DEF. I filled this weekend and it took about a quart and a half.



I am new to Diesel engine operations and DEF was unheard of before I bought this rig. I think it does warrant a separate thread. It is unrelated to fuel consumption and I would guess many know nothing about this additive.



Who wants to start one?

Def- Mine def light just went off for the first time at exactly 8000 miles.

Gas mpg - averaging 13.9 on my drive from KY to Arizona so far, I am happy with that because it's been windy and I have avg 75 miles per hour.


2016 Sunseeker W MBS

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Old 07-14-2016, 12:38 AM   #99
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Originally Posted by Santos1060 View Post
Perhaps a new thread is in order, but I've got almost 4,000 miles on my W so far and the DEF light hasn't even come on. The gauge shows that I'm about 1/2 full. Curious if that's the same for others because it contradicts the previous post above about it lasting only 2,000 miles?
What gauge is that, please?
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Old 07-14-2016, 12:39 AM   #100
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Originally Posted by Aspenmeadow View Post
I now have about 3000 miles on mine with no warnings of DEF. I filled this weekend and it took about a quart and a half.

I am new to Diesel engine operations and DEF was unheard of before I bought this rig. I think it does warrant a separate thread. It is unrelated to fuel consumption and I would guess many know nothing about this additive.

Who wants to start one?
There is a lot already on these forums about DEF - I would suggest going to the motorhomes general page and search "DEF" for the threads.
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