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Expert Answers about Mercedes-Benz Sprinter 3500


  • One Side of Trailer Lights Not Working With C35FR
  • Since one side of the trailer lights is working fine, it leads me to believe the issue is something other than the 7-Way to 5-Way/4-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs # C35FR. If this were the issue (if the adapter were not working as intended), then it would reason that there would be faults on both sides with your vehicle. My best guess is that the issue is with the actual trailer wiring, or possibly the connector. Since you have a 2021 Sprinter,...
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  • Troubleshooting N.C. Message on Newly Installed Tekonsha Prodigy P2 Brake Controller
  • The N.C. readout you are getting on the Tekonsha Prodigy P2 Brake Controller # 90885 means that the unit is not detecting a connected trailer. This is usually the result of a corroded 7-Way on the vehicle or trailer but since both are brand new this likely isn't the case. The brake controller detects a trailer by sensing a power draw on the blue brake output wire when it's connected. With this in mind I recommend tracing along the blue wire from the back of the P2 to the 7-Way and look...
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  • Trouble with Removal of Thule T2 Add-On
  • Other than the two bolts in the shaft the only thing left to be done when trying to remove the 2 Bike Add-On for Thule T2 Pro XTB # TH9036XT would be to loosen the linkage using the hex key. The linkage is threaded into the center bolt hole below where the Add-On piece slides in. If you have already done that as well, then you are not missing anything else that needs to be removed. It is likely binding up from shifting around during use. Try moving it around and trying to remove it with...
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  • Rola LED Light Kit Blinking 2018 Mercedes-Benz Sprinter 3500
  • It sounds like it could be a grounding issue involving your vehicles 4-way harness. If you installed the 4 way harness ensure that the white ground wire is grounded to a clean bare metal surface for a good connection.
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  • Troubleshooting GearSpace 34 with Hitch Extender Sagging on 2020 Mercedes-Benz Sprinter 3500
  • From the pictures you sent it looks like your setup is overloaded. It is important to remember that the use of an extender like this will reduce the capacity of your hitch by 50%. That means if you have a hitch like the Curt # C13388, your maximum tongue weight has been reduced from 600 lbs to 300 lbs. If your hitch has a 500 lbs maximum tongue weight it will be 250 lbs with the extender. According to the manufacturer, the minimum tongue weight rating for your hitch must be 350 lbs in...
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  • Troubleshooting Intermittent Curt Echo Brake Controller Trailer Connection Error Code
  • If you are seeing a message that says trailer disconnected that would mean that the Echo # C51180 is not connected to the trailer at all and would not be able to control the brakes. If this is an intermittent issue then most likely it's just a bit of corrosion on the pins of your trailer connector that is preventing the connection from being made. Typically just taking some sandpaper to the pins of the connectors fixes this issue.
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  • How to Check Timbren Rubber Springs for Bad Performance on Class B Motorhome
  • It's entirely possible for any product to fail at some point in time but I would be shocked if the Timbren Rear Suspension Enhancement System # TMBRSP35A on your 2018 Mercedes-Benz Sprinter 3500 is failing because these are solid pieces of heavy duty rubber so it's not like an air bag kit that can develop a leak. I would check to see if these are maybe rolling away when you go over one of the dips like you mentioned. The bottom of the Timbrens should be making contact with your motorhome...
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  • Go Power Solar Controller Blinking POL
  • The POL error code on your Go Power system after plugging in the Go Power Portable Solar Panel with Digital Solar Controller, # 34282610 is indicating a reversed polarity connection. You have your negative and positive leads reversed. I suggest you change the wires on the campers port to reflect the leads of your portable system.
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  • Help Opening Vent Lid On MaxxAir Roof Vent Fan After Removing Lift Motor
  • It sounds like your Operator Mechanism # MA10-20281K-1AF is not allowing you to open the vent lid after you removed the motor. As you have removed the Motor # MA10-20270 you can try to stick a screw driver up into the gear on the operator mechanism to turn it manually and raise your vent lid. This may be a 2 person job to provide slight pressure opening the vent lid while someone else turns a screw driver in the mechanism. A flat head as close to the size of the gear on the motor is going...
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  • Trouble Removing the MaxxAir MaxxFan Lift Motor From Roof Vent
  • I think you may have missed a screw as there are 3 screws which hold the Lift Motor # MA10-20270 in place on your MaxxAir MaxxFan. With all 3 screws removed the motor should fall out fairly easily. Be sure you are removing the mounting screws and not the screws which hold the case together as there are also 3 of those.
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  • Troubleshooting Charge Line Not Functioning on 2017 Winnebago View
  • Based on your pictures your 2017 Winnebago View does in fact have a charge line. The + on the number 4 pin should have 12 Volt power. If you haven't tested it, I recommend using a circuit tester like the # PTW2993 to see if there is power on that pin/wire. If you don't have power it is probably an issue with a fuse. Try checking the owner's manual for the fuse location and add or replace the fuse if necessary. If you are unable to get this to work it is possible there is a different issue...
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  • How To Help Counter Sag On A 2022 Mercedes-Benz Sprinter 3500
  • Though you will not fully be able to eliminate sag you will be able to help reduce it by using the SumoSprings Rebel Custom Helper Springs # SS55FR. These springs are maintenance-free and will help upgrade your 2022 Mercedes-Benz Sprinter 3500. I like the springs because they have an easy, bolt-on installation and are maintenance-free and have no tubing to run or air pressure to monitor like your standard air springs. The Sumo Springs have a 3,000 pound weight capacity and will not increase...
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  • Troubleshooting MaxxFan Deluxe Roof Vent Fan Mounted Panel Not Functioning But Remote Does
  • Since your MaxxFan Deluxe Roof Vent, part # MA00-07500K or # MA00-07000K, works with the remote it sounds like your circuit board is working just fine and you just need to replace the keypad with part # MA10-21304K.
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  • Troubleshooting No Audio Output From Jensen JWM10A on a 2019 Thor Motorhome
  • If replacing the unit with a Jensen JWM10A didn't fix the problem then I recommend checking out your wiring. You can either physically inspect it for damage or hook your new stereo up to a whole different wiring and speaker system so you can determine if it's the wiring or not. It could also be just your speakers so basically you're trying to figure out whether it's the wiring or the speakers.
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  • Best Way to Access a Valterra RV Sewer Hose Storage Hatch That is Locked Without a Key
  • It looks like you have the Valterra RV Sewer Hose Storage Hatch w/ Lock # D04-0471VP, which means you'd have a lock like the Replacement Cam Lock with Key # A510 instead of the Valterra Replacement Cam Lock # A520VP. The correct keys would have that black top as well, like with the # D04-0471VP and # A510. I am not sure of any lock picking tricks, but the best way to get a lock unlocked is a locksmith. Looking at the lock, I do not see why you wouldn't be able to drill it out. You would...
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