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Old 10-04-2020, 12:29 AM   #1
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Mercedes Sprinter Upgrade Rocks!

If you have a Mercedes Sprinter with stock 188Hp turbo diesel, it can be retuned by OE Tuning back to itís designed specs. They just did mine and took it from 188 to 260Hp and torque from 325 to 450Ft-Lbs.I donít have fuel economy numbers yet but their customers are reporting 1-4 mpg improvements there too. My 2018 Thor 24HL climbs hills soooo much better now and I canít wait to take it out on the highway for mileage comparison. OE Tuning rocks!
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Old 10-04-2020, 12:34 AM   #2
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Color me interested!!
Do you have a phone number or website address for them?
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Old 10-04-2020, 01:14 AM   #3
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Quote:
Originally Posted by Bob Denman View Post
Color me interested!!
Do you have a phone number or website address for them?
https://www.oetuning.com/mercedes-benz-sprinter-350-bluetec
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Old 10-04-2020, 01:41 AM   #4
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Awesome: Thanks!
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Old 10-04-2020, 02:12 AM   #5
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How does it affect the factory warranty?
I'm thinking I've read that Mercedes can detect if a tuner has been inside the brain no matter how you reset to factory before Taking it in for service.
If mb '8's' your Vin when they find that tune, you may not even get serviced.
Or not.
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Old 10-04-2020, 01:45 PM   #6
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Itís all software

Quote:
Originally Posted by Bob Denman View Post
Awesome: Thanks!
Good morning Bob, I forgot to mention that the product is all software - no need to visit their shop with your rig. I sent them my engine computer by FedEx, they did the upgrade in a day and sent it back by FedEx... super easy.
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Old 10-04-2020, 01:52 PM   #7
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Donít know the answer

Quote:
Originally Posted by ducksface View Post
How does it affect the factory warranty?
I'm thinking I've read that Mercedes can detect if a tuner has been inside the brain no matter how you reset to factory before Taking it in for service.
If mb '8's' your Vin when they find that tune, you may not even get serviced.
Or not.
I donít know the answer. But the tune can be reset to factory before taking it for service and then reinstalled.
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Old 10-04-2020, 02:18 PM   #8
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Originally Posted by JimHoover View Post
Good morning Bob, I forgot to mention that the product is all software - no need to visit their shop with your rig. I sent them my engine computer by FedEx, they did the upgrade in a day and sent it back by FedEx... super easy.
Excellent! What was the turnaround time?
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Old 10-04-2020, 02:30 PM   #9
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Excellent! What was the turnaround time?
I had it back in 2 days. I bought the MyGenius interface for $250 so I can switch between tunes on my own now.
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Old 10-04-2020, 02:38 PM   #10
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I saw the references to MyGenius on the site...
Does that store the OEM tune, and the hotter set-up as well?
(if a Dealer downloads a tuning program to the MB CPU during a routine service: can you re-install the aftermarket tuning upgrade?
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Old 10-04-2020, 03:52 PM   #11
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Yes, you have MyGenius correct, but I don’t know if it stores more than one tune at a time - it might, I’ll have to read the instructions :-o I’ve only used it once to download my OEM tune and archive it on my laptop. I haven’t tried to download my new tune yet. OETuning also archives my tunes in case I need them. Their Chief Engineer Jeremy is in Australia and good about replying to their common email.

The new and old tunes can be sent via email and loaded on MyGenius. They needed my engine CPU to build an updated model for retuning so they paid for FedEx both ways and did a quick/same day turn around - excellent service. BTW the engine CPU on the 2018 Sprinter 3500 is VERY easy to remove if necessary.
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Old 10-04-2020, 04:05 PM   #12
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Asked the warranty question - stay tuned ;-)

Quote:
Originally Posted by ducksface View Post
How does it affect the factory warranty?
I'm thinking I've read that Mercedes can detect if a tuner has been inside the brain no matter how you reset to factory before Taking it in for service.
If mb '8's' your Vin when they find that tune, you may not even get serviced.
Or not.
I asked OETuning the MB warranty question in email and will share what they say.
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Old 10-04-2020, 04:14 PM   #13
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I've been aware of CPU reflashing for about five years. Ir is well-known for good results on Can Am Spyders.
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Old 10-04-2020, 05:25 PM   #14
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Quote:
Originally Posted by JimHoover View Post
I asked OETuning the MB warranty question in email and will share what they say.
Asking the third party vendor in Australia about the ramifications of a German manufacturer regarding the manufacturers rules about a USA based vehicle isn't going to get much in the way of facts. They did after all sell you something and need to protect their ware.

Asking Mercedes will get you an absolutely definitive answer.

I have three computer tuned vehicles all running 91 octane with advantages similar to your tuner, so mine isn't a tuner issue.
But
I don't care about factory warranties or factory service.

If you're out of warranty and have no local smog laws there isn't an issue and you can disregard my post.

(there's a real reason why they allow your vehicle to go back to factory specs. It has to do with factory and State and county rules)
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Old 10-04-2020, 06:43 PM   #15
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Iíd also worry about added stresses on engine and drivetrain. Laws and warranty are important, but Iíd be concerned about why Mercedes doesnít provide 260 HP and 450 lb-ft from factory. Different programming wouldnít cost them anything, and if there are no mechanical or emissions downsides, then why not reflash at factory?

Greater power and torque is always a competitive advantage, so why not take advantage?
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Old 10-04-2020, 07:07 PM   #16
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I'm no engineer; but it's not likely that your right foot will be trying to push the loud pedal through the firewall 100% of the time anyway...
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Old 10-04-2020, 07:53 PM   #17
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I'm no engineer

Precisely. But you know about insurance

I know little about insurance.
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Old 10-04-2020, 08:09 PM   #18
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Precisely...

But Insurance is simple:
Pay your bills on time, and don't screw up!
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Old 10-04-2020, 10:31 PM   #19
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I would be concerned about the rest of the drive train, transmission, driveshaft, rear axle assembly. Is it designed for and able to withstand the additional HP & torque, long term? I don't know the answer, but I would certainly have those concerns.
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Old 10-06-2020, 03:18 AM   #20
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I would be concerned about the rest of the drive train, transmission, driveshaft, rear axle assembly. Is it designed for and able to withstand the additional HP & torque, long term? I don't know the answer, but I would certainly have those concerns.
I would tend to agree with you. Making roughly a 25-50% increase in torque on a gas engine, we usually start talking about different oil distribution, rockers, piston rings, and valves/guides. If it was just 10% maybe no big deal, but thatís a heck of an increase for all other internals staying the same. I can almost guarantee, they probably have some other weak link in the internals as to why they didnít inherently tune to that spec.

Plenty of information on the Internet as why it is this way. Maybe we have some Mercedes Diesel mechanics who can chime in. They probably would know for sure about the specs of internals placed in these engines.

Jeff
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