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71
Unity / TPMS heat sensor on dually behind exhaust
Last post by dfredenburg -
WIth the dually tires I was uncomfortable not knowing the pressure of the inner back tires, so the solution was a TPMS that was already in the box in back of a 2016 Unity I bought 2 years ago.  After installing it (and now knowing why the previous owner hadn't gotten around to doing it) I noticed that the pressure readings do increase as expected especially with highway travel.  However,, I also noticed the temp on the R rear dually will run anywhere from 10 to 50 degrees warmer than all the others, although the tire doesn't feel particularly warm.  The tire pressures rise and fall appropriately and equally with speed, regardless of temp readings The exhaust is just in front of the R rear dually, just behind the galley door.  Has anyone had a similar issue where the temp sensor is reading the exhaust more than the tire temp?

I do have an IR temp gun coming to actually measure the tire separate from the sensor, so hopefully not an issue.  This may be a case where there is just plain too much information.  That then becoming perplexing and misleading just by the hot exhaust flowing over the dually with TPMS sensors--that is I hope.  Any thoughts appreciated.
72
Unity / The Sprinter Forum
Last post by Trekerron -
I just wanted to share this info as it may be very useful to those of you who want to do their own maintenance or customizations to their Sprinter-based motor homes. 

There is a forum of Mercedes Benz Sprinter owners, mechanics, outfitters, etc. called "The Sprinter Forum."  It is free to join and use.  It is full of all kinds of information, questions, answers and useful stuff on Sprinters.  I have found tons of helpful things on here. 

Here is the link:  Sprinter-Source.com

You have to register to get full access to the site, but that is free and easy.

I hope you find it useful!
73
Serenity / Libero / Re: Backup camera on my unity.
Last post by RV_Outfitter_PDX -
If your chassis is a 2019 or newer you have the MBUX display on your dash. MidCity Engineering makes an upgrade that can be installed by an RV dealership or Van Upfitting shop that allows you to pull up your rear view camera at ANY speed on your MBUX display.

MidCity Camera On Demand:
2019-2024 Sprinter (907) MBUX Rear Camera On-Demand: 907RVC-I | Mid City...

Alternatively, you could have a local stereo shop add a rear view mirror system like this one from Etrailer:
https://www.etrailer.com/Backup-Camera/Rear-View-Safety/RVS-718-BB.html?feed=npn&gad_source=1&gclid=Cj0KCQjwjNS3BhChARIsAOxBM6pcEvAp75D_k0hasIwG6IXcazHB1ny2ZzAIIKuby9EnoE9Vbr99n0IaAnuXEALw_wcB
74
Unity / Re: Dragonfly Lithium batteries not holding charge
Last post by RV_Outfitter_PDX -
A SmartShunt is a great suggestion, this will help greatly with monitoring your Lithium battery state. The smart shunt connects through the VictronConnect phone app and displays battery percentage, amps displayed as positive represent charge, amps displayed as negative represent draw, estimation of how long batteries will last based on current energy consumption, and more!

NOTE: Your Battleborn batteries have a 10 year limited warranty you should learn about here:
Product Manuals, Cutsheets & Data | Battle Born Batteries


If you have a 12V fridge this will run about 50HRS off of your battery with nothing else running.

When you are not plugged into shore power make sure your inverter is off.

Make sure when you are not plugged into shore power you turn off your water heater, furnace, water pump, lights, winegard, digital TV antenna, fans. These all being off will help to conserve power.

If you find that you wish for more off-grid capacity there are some very easy upgrades that can be done!

Option 1: Add 2 more GC2 battleborn lithium batteries in the exterior storage compartment where the inverter is located. This would add an additional 200Ah of lithium battery! Battleborn GC2s are about $1,000 each plus shipping.

Option 2: Replace the existing battleborn GC2's under the stepwell with an Epoch 300Ah battery or 2 Expion360 162Ah GC2s.
Epoch batteries are a great low cost option for a quality lithium battery. Expion360 is a reputable battery brand although is much more expensive. Both of these batteries have an advantage that there is an internal bluetooth battery monitoring system. Meaning you would not need to add a shunt to monitor batteries.

The 2025 Unity's are coming with a 270Ah standard battery or a 540Ah optional 2 battery system.


12V 300Ah Heated & Bluetooth LiFePO4 Battery - Epoch Essentials

12V 162Ah GC2 SmartTalk & VHC


Note on aftermarket batteries: The Expion360 GC2s are slightly taller than the battleborn GC2s so you need to make a slight modification to the top lip of the battery compartment for them to go in.

The Epoch 300Ah battery is 1/2 inch deeper than the GC2's. In some cases some of the fuses or wiring has to be moved over slightly in the battery compartment to fit this battery.
75
Unity / Re: window shade removal
Last post by RV_Outfitter_PDX -
You have to pop the plastic caps off the end of the valance. There's two plastic clips in the front and one in the back of the cap. Once the caps are off it's pretty straight forward. If you're trying to increase the tension of the roller retrieve just push the black plastic plug on the end of the roller in and turn it whichever direction increases the resistance. Be careful when you push the plug in that it doesn't uncoil the spring tension, it helps to use a stubby flathead screwdriver so this doesn't happen.
76
Unity / Re: Rear-View Camera
Last post by RV_Outfitter_PDX -
If your chassis is a 2019 or newer you have the MBUX display on your dash. MidCity Engineering makes an upgrade that can be installed by an RV dealership or Van Upfitting shop that allows you to pull up your rear view camera at ANY speed on your MBUX display.

MidCity Camera On Demand:
2019-2024 Sprinter (907) MBUX Rear Camera On-Demand: 907RVC-I | Mid City...

Alternatively, you could have a local stereo shop add a rear view mirror system like this one from Etrailer:
https://www.etrailer.com/Backup-Camera/Rear-View-Safety/RVS-718-BB.html?feed=npn&gad_source=1&gclid=Cj0KCQjwjNS3BhChARIsAOxBM6pcEvAp75D_k0hasIwG6IXcazHB1ny2ZzAIIKuby9EnoE9Vbr99n0IaAnuXEALw_wcB
77
Unity / Re: Victron 712 Install
Last post by RV_Outfitter_PDX -
When installing the Smart Shunt, the goal is to have all of the grounds that go to the battery go through the "system" side of the Shunt first before the battery. This will ensure that you are picking up all of the power going in or out of the battery from all sources.

Once the Shunt is installed it needs to be programed for the specifics of your battery system. Battery type, AH of total battery bank, charged voltage, etc.

After you program the Shunt settings DO NOT calibrate the shunt. Plug your RV into shore power and allow the batteries to reach full charge. This will "sync" the batteries to the Shunt so it will start displaying accurate information. Until this first full charge the Shunt may not display accurate information.

Depending on the year of your coach a 5amp draw might be reasonable. Make sure your inverter is off, this will reduce the draw by an amp or so. Also try to turn all of the lights, water pump, fans, winegard, digital TV antenna and anything else off. This will give you a better idea of your "standby" draw.

79
Unity / Re: Active brake assist is off, cruise don't work
Last post by RV_Outfitter_PDX -
On a Mercedes-Benz Sprinter, the sensors for the Active Brake Assist system (also known as Active Distance Assist DISTRONIC or Collision Prevention Assist) are primarily located in the following areas:

Front Grille: There is a radar sensor behind the Mercedes emblem or grille, which is responsible for detecting objects and vehicles in front of the van. This sensor is essential for the system to calculate distances and recognize potential collision threats.

Windshield (behind the rearview mirror): A camera mounted near or behind the rearview mirror monitors lane markings, vehicles, and other objects in the van's path. If this camera gets dirty or obstructed (e.g., by dust, snow, or ice), it can affect the system's functionality.

To clean these sensors:

For the radar sensor, gently clean the grille area with a soft, damp cloth to remove any dirt, bugs, or debris.
For the windshield camera, ensure the area in front of the camera is clean. Avoid using abrasive materials that might scratch the windshield in that section.
Once the sensors are clean, the system should resume working as intended. If the warning persists, you may need to have the sensors recalibrated by a dealer or certified technician.