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post #1 of 12 (permalink) Old 12-02-2014, 09:48 AM Thread Starter
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New diesel owner...what do I need to know?

This evening, hopefully, I take delivery of a 2008 ML320CDI diesel. This is my first diesel-powered vehicle. What do I need to know after a lifetime of gasoline?

The one big concern I have is living in Minnesota, and having to park outside during the day (and occasionally overnight) at the office. Assuming I buy diesel here in Minnesota, do I need to do anything to it? I've seen recommendations to add Power Service Winter Formula to every tank and carry a bottle of Diesel 9*1*1 with me just in case. Of course, Mercedes recommends against any fuel additives...but I really want the truck to start after sitting out overnight in -30 F weather.

And yes, I know maintenance has to be religiously done, as with any Mercedes. That doesn't bother me; I do my own anyway.
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post #2 of 12 (permalink) Old 12-02-2014, 01:53 PM
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Congratulations on new ride.
320 cdi have only 1 point that require careful checking and those are injector seals. I made a topic about them years ago in W211 section.
Check what % of bio your state adds to diesel. Each gas station has to have it posted, but it doesn't have highly visible place.
cdi have reported problems with bio going over 5%.
I've been starting our older diesel after whole day of skiing just fine and cdi are way better, so I don't think you need to worry about that .
Morning starts at -30F are reported as no issue as well, but cars sold for such climates usually have Webasto build in.
In lack of such I would plan on plugging the car in.

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post #3 of 12 (permalink) Old 12-02-2014, 01:58 PM
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BTW as you noted - we do have to post diesel questions in General as
WE DO NOT HAVE DIESEL SECTION

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post #4 of 12 (permalink) Old 12-02-2014, 02:13 PM
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Quote:
Originally Posted by jaymaynard View Post
This evening, hopefully, I take delivery of a 2008 ML320CDI diesel. This is my first diesel-powered vehicle. What do I need to know after a lifetime of gasoline?
DON'T put gas in it by mistake!

When out on the road, it's always best to watch out for Pot holes, Sink holes, and those other Holes!

Robert AKA: EEEEZY
You can't get us confused. I'm also "Nice", but NYYYCE is NEVER "Easy"!
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post #5 of 12 (permalink) Old 12-02-2014, 08:10 PM Thread Starter
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Check what % of bio your state adds to diesel. Each gas station has to have it posted, but it doesn't have highly visible place.
cdi have reported problems with bio going over 5%.
The pump at the station I use just says "between 5 and 20 percent". IIRC, Minnesota has a fairly aggressive biodiesel mandate.

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Morning starts at -30F are reported as no issue as well, but cars sold for such climates usually have Webasto build in.
What's Webasto?

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In lack of such I would plan on plugging the car in.
Don't think it has a heater...
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post #6 of 12 (permalink) Old 12-02-2014, 08:37 PM
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I remember now I read it on this forum that diesel owners in Minnesota suffer from high % of bio. Is filling up in neighborhood state an option?
Webasto is aux heater that have an option to warm up the engine, or engine and the cab.
Seems 90% of north Europe models have them factory installed, but US and Canada never got them.
If you have below -20F often, you should have it as the engine might never reach operating temperatures and the occupants will suffer as well.
They can be installed by DIY, but are costly.
All older MB diesel did have engine electric heater installed in factory. Some of the come with cable, some without, but the element was there.
I would assume 320cdi has one as well, but ask fellow 320cdi owners.

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post #7 of 12 (permalink) Old 12-02-2014, 09:01 PM Thread Starter
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Well, the next town over in Iowa is about 20 miles away...but doesn't offer the fuel discounts I can get here. How big a problem is B20? IIRC, it's only used in summer; winter blends are at the low end of the scale.

There's a guy on the 164 forum who is adding a block heater...three part numbers, he says about $200 from the dealer.
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post #8 of 12 (permalink) Old 12-03-2014, 10:18 AM
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My dealer told me to have 2 emergency aerosols - additive in case diesel "jellied"? - apparently can happen if its sits outside at a very cold temperature. And I forgot whats the other is for - think just to prophylactically add in case the temperature drops below -20. Reading manual as we speak - but would be nice to hear from the diesel owners.

He didnt remember the name - told me to go to Wallmart and ask ))
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post #9 of 12 (permalink) Old 12-03-2014, 10:34 AM
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Couple years ago, with my truck I ended up in North Dakota at -35F overnight.
Surprisingly they did not have D1 at gas stations as summer blend should be good down to -20
I had my truck plug in overnight, but people living on cold climate like Diesel Klen additive.

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post #10 of 12 (permalink) Old 12-03-2014, 11:40 AM
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So, do I need to specify at gas station anytimeduring the winter what type of fuel they have? Thought that back in Europe they have winter one and than "arctic" type - for extreme cold. Do I add additive in anticipation of the severe cold or just in case its got jellied - my sales guy told me that it takes "seconds" to defrost it with addition of aerosol.
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