The engine revs up for about 25 minutes to clean the filter.
Of course you have to be in a safe place on cement outdoors keeping people away from the exhaust pipe.
This kinda implies that you can idle the engine to charge the batteries, both house and chassis, without driving as long as you are monitoring the Diesel Particulate Filter display in the cockpit to make sure you don't go over 100%.
Forcing the REGN per the manual might be something to do when there is no other viable option but if your SOC is down to 10%, a 20 -0 25 minute run will only get you so far.
There is a reason why Mercedes offered a High Idle option for applications where the engine had to idle over long periods of time or idle repeatedly. They offered it as a simple ECU programming update up until the EPA and some individual state regulations were too restrictive to keep offering it.
It's not just monitoring the DPF Level. Idling a diesel under 1000 RPM's for more than a few minutes and / or doing it repeatedly causes excessive soot build-up because exhaust temperatures do not get hot enough. Done enough REGEN's may not be as effective and it can prematurely clog the DPF. MB can deny an Emissions Warranty Claim from excessive idling as stated in Brian's document.
Wet Stacking will also occur as unburned diesel washes down the cylinder walls. Besides premature cylinder wear, the diesel will mix with the oil and reduce lubrication that can cause bearing and other lubrication-related failures. To prevent oil dilution that could cause premature wear and failures the 20,000 mile oil change interval will drop down to 3,000 - 5,000 miles.
I am considering two after market High Idle Options for the Sprinter in case I am in a situation where I can't get the batteries charged. Not sure I will do it but I have done the research and there are two options available.
One option is from Mid City Engineering, which specializes in Sprinter RV's. Some Conversion Companies install their High Idle Option as a standard offering. They are the most expensive but they offer three flavors of the High Idle Option. Their most expensive option also adds the factory Remote Start capability with the key fob and also the factory alarm capability. The High Idle works exactly the same way it did when Mercedes offered it.
The second option is from I/O Pedal. It is primarily a pedal tuner that simply plugs into the accelerator wiring harness and an app allows you to select your Idle RPM like 1400RPM, when Regens will occur.
Neither solution re-flashes the ECU to void the warranty but Mercedes started cracking down on the Mid City Option because it prevented ECU updates from occurring properly and it added labor time to resolve the issue at dealerships. Dealers were taking the system out and charging owners for the labor. Mid City has since come out with a way to enable a bypass for their system so it won't interfere with ECU updates if you take it into the dealer.
I would remove either system before going in for any Mercedes warranty work. The I/O system can be removed in two minutes while the Mid City solution takes a little more effort.
https://www.midcityengineering.com/sprinter-rv/
https://agileoffroad.com/product/iopedal-throttle-tuner-with-high-idle/
I have a Banks iDash SuperGauge I pulled from my Super C. I was in the process of trying to sell it but I may now install in my Freedom Edition. It just plugs into the ODBII port and provides a lot of user-configurable information at a quick glance on a small display such as DPF and REGEN Status, Exhaust Temps, Turbo Performance, etc. After doing some research it looks like it is compatible with the OM642 engine but not the VS30 or new I4.
The funny thing is I just ordered a new ODBII Scanner that is supposed to be compatible with my 2022 Sprinter Chassis. I've read enough about quirky error codes on the Sprinter that I decided it was worth having in case something happened out in the middle of nowhere and I need to clear or read a code. I believe it can also force a REGEN, so that could be handy if it shows the DPF Level is over 100%. Hopefully I can use it to scan for an interrupted REGEN as well if my Banks iDash won't display it.
https://www.amazon.com/gp/product/B0CMG7Q7YP/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1