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Old 08-02-2019, 07:39 PM   #1
Scarecrow
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Default Mercedes-Benz Peculiarities

Maybe it's just my luck...

1) Pulled into Coeur d'Alene, Idaho last night. Had just topped-off the windshield washer fluid several miles before. Got a "Check Washer Fluid" warning. Sure enough, the container was empty. Refilled it and watched it drain before my eyes. Slowly, but it was definitely draining.

This morning, I stopped at the M-B dealer in Spokane. Their schedule was FULL, but they did me right by fitting it in within the hour. Only to find out a hose came off at the bottom of the internal pump. Reconnected it. Secured it to prevent it happening again. No charge! Under Warranty!

I got free coffee, free Wall Street Journal, free Washer Fluid, and a Free Wash of the RV. On my way in an hour and a half. Cool!

But anybody ever have this problem?

2) Today, on my to Glacier. The following has happened a few times, but I thought I was imagining it.
A/C is cranking fantastic. Blowing good amount of air. Freezing me out of the cab. Glad I hung those curtains!

At one point, I turn the A/C down. Then off. Enjoying the cruise through the Scenic Byway. 75mph downhill, baby!!

Get out of thr trees for awhile. Turn the A/C back on. A/C acts like it is a Dometic refrigerator!! Fan sounds like it is blowing hard, but the cooling SUCKS! Nothing I could adjust made it perform like before - - except pulling over and turning off the engine. Restarting brought the A/C back online, full-blast. This has happened before.

Anybody know what causes this?

I do not believe it is a frozen line because I only stopped and went through the restart in a matter of minutes. It's like a circuit never gets activated.
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Old 08-02-2019, 08:17 PM   #2
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Default Re: Mercedes-Benz Peculiarities

Perhaps some weird equivalent to compressor stall?
(can happen if compressor is stopped/restarted with too short a time interval in-between ... which doesn't seem to match your conditions)
((the usual desired time delay is 3 minutes or longer))

The engine off/on "reset" speaks of confused electronics.

--dick
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Old 08-02-2019, 08:45 PM   #3
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Default Re: Mercedes-Benz Peculiarities

Sounds like condenser freeze-up and compressor short-cycle. If short-cycling can occur on a Sprinter?

May I suggest a few tips? Turn-off the A/C first and adjust fan to max to circulate outside air. Note: Outside air is filtered, inside air is not and may be the reason why the new Sprinters cabin air filter is located behind the glove compartment to provide air filtering to both inside and outside modes.

Allowing the fan to circulate air will give the condenser an opportunity to shed any condensation or ice accumulation. Additionally, open all cabin vents to maximize flow volume and minimize potential condenser icing during AC operation.

Allowing the condenser to dry out is particularly important prior to long-term storage to avoid the moldy smell.

I find it takes a couple of 3-miles for the condenser to exhaust all of its coolness and begin blowing ambient temperature.

Last edited by Bobnoxious; 08-02-2019 at 09:24 PM.
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Old 08-02-2019, 10:59 PM   #4
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Default Re: Mercedes-Benz Peculiarities

I had a similar issue on my 2016. Drove across all of Illinois with no AC. Wife not happy at all. Worked fine the next day. I put the I-CarSoft MB code reader and it came up with an error code that said air control door not matching command (something close to that). Apparently it was just a glitch. No code light on dash and I never took it in because it never happened again. If I ever see that again, I'll write down the code number and description.
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Old 08-02-2019, 11:12 PM   #5
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Default Re: Mercedes-Benz Peculiarities

I'm going to experiment if I am confronted with a similar unfortunate circumstance.

After turning the vehicle off, I'll wait 15 minutes as described in the 2019 owners manual and then disconnect the ground battery Quick disconnect. My 2015 owners manual said 10 minutes. So apparently there is a reason to wait an additional five minutes due to a software revision???

Then I would let it sit disconnected for 45 minutes or even longer. I come up with this time resding marrying an ECU to a vehicle. Can't remember the specifics, but 45 minutes was the time for it to perform are not perform some function.

Afterwords, I would reconnect the vehicle as prescribed and the owners manual by insert afterwords I would reconnect the battery and wait 15 minutes before starting the vehicle. I would then start the vehicle and take it on a highway cruise.

This will not cause any harm to the vehicle.
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Old 08-03-2019, 12:23 AM   #6
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Default Mercedes-Benz Peculiarities

There was a recent thread on this forum for a similar situation. If you set the temperature dial to maximum cooling and the fan speed to low, the unit freezes up consistently. Makes a lot of noise but provides very little cold air. Solution is to back off on the temperature dial slightly or raise fan speed after allowing unit to defrost.

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Last edited by gltrimble; 08-03-2019 at 02:39 PM.
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Old 08-03-2019, 12:29 AM   #7
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Default Re: Mercedes-Benz Peculiarities

I don't know what its cooling capacity is, but assume it's large.
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Old 08-03-2019, 02:40 AM   #8
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Default Re: Mercedes-Benz Peculiarities

Hmmm... Mine always recovers itself by simply turning off the engine, and restarting it. No lengthy waiting period. Adjusting the controls on the dash does not help, other than reducing the fan speed. I sincerely do not think it is a freezing issue.
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Old 08-03-2019, 03:02 AM   #9
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Default Re: Mercedes-Benz Peculiarities

How humid was it?
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Old 08-03-2019, 02:06 PM   #10
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Default Re: Mercedes-Benz Peculiarities

Quote:
Originally Posted by rollerbearing View Post
How humid was it?
Not sure. So far, humidity is something I think about in Maryland (rated a sub-tropical climate in some journals), but I have not noticed it out West. I'm not sure it has anything to do with the sudden "malfunctioning" of the climate control system - especially when a restart "fixes" it.

A/C does draw out the humidity inside the vehicle, which is why it is recommended to clear up a fogged windshield. But I've had no fogged windshields in the mornings on this trip.
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