Expert Answers about Mercedes-Benz

• Skid Wheels for Motorhome to Prevent Scraping When Backing into Parking Spot
• For preventing scraping when backing a motorhome into a spot typically the best solution is to use a set of skid wheels like the part # UF48-979013 for motorhomes that are 34 feet and longer or the part # UF48-979011 for less than 30 feet. The install of water heaters like the Furrion Tankless water heater like part # FR98SR should only be done by a professional.
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• Parts Needed to Install Trailer Brake Controller and 7-Way in 2010 Mercedes-Benz ML350
• If you are trying to install a trailer brake controller in your 2010 Mercedes-Benz ML350 the parts you will need are the brake controller itself, such as the Prodigy P3 # 90195, our installation kit # ETBC7 and a 4-pole wiring harness # C59236 if you do not already have one. These three items are all that are needed to install a brake controller and 7-way trailer connector with all light and power functions. Helpful video and FAQ links are included for you.
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• Trailer LED Lights Not Working when Connected to a 2012 Mercedes ML350
• This is a common problem with Mercedes vehicles and trailers that have LED lights. Basically the LED lights do not draw enough power for the vehicle to recognize they are there and sometimes they sense it as a burned out bulb so you might see an error message displayed in the vehicle. One option is to use a special adapter, # C35FR for a 7- to 4-Way or # C57003 for a 7- to 7-Way. These adapters have load resistors to simulate incandescent bulbs so the LED lights will work. If the Mercedes...
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• 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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• CTEK Multi US Charger Green Flashing Power Light
• You're correct that the green flashing power light on the CTEK MULTI US 7002 # CTEK56353 is normal- the green power indicator light should be continually flashing during the reconditioning or charging process. If it is not flashing then the charger is not recognizing the battery. This could be due to an bad connection or a completely dead battery. Normally the reconditioning cycle occurs at the beginning of the cycle, so it still should have provided a full charge on this battery. If it...
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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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• Bulb-Out Sensor in 2015 Mercedes ML350 Goes Off When Towing Trailer w/ LED Taillights
• I'm assuming your trailer has LED lights. What's going on is that the bulb-out sensors aren't sensing enough power draw through the taillight circuits. The system thinks you have a burned out bulb, so it warns you about it. We do indeed have the adapter you're looking for, part # C35FR. This is a 7-way to 4 or 5 pole trailer connector adapter that has load resistors installed in it. The resistors fool the bulb out sensor in the vehicle.
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• Troubleshooting An RVS Camera System With Mixed Up Camera Views
• I spoke with the manufacturer and they stated they have experienced this is the past with another Rear View Safety Backup Camera System # RVS-062710 and that it's a signal issue. To resolve the issue they recommend disconnecting power to all cameras and then to connect and trigger them one at a time to see if they correctly trigger and go back to their correct side.
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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 Solid Blue Light on Curt Echo Brake Controller
• The solid blue light on the Curt Echo # C51180 means that the controller is paired to your smart device but the controller isn't sensing that the trailer is connected. Since your trailer was working just fine a few weeks ago and the controller is still paired to your smart device this leads me to believe that there is an issue with the wiring on your trailer. Try checking to make sure that your trailer connector is clean and free of any debris or corrosion. If that looks good then check...
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• Where to Access Brake Signal for Curt Spectrum Brake Controller in 2010 Mercedes-Benz ML350 BlueTec
• To correct the unwanted braking action from your Curt Spectrum # C51170 caused by the 3.6V monitoring signal generated by your 2010 Mercedes-Benz ML350 BlueTec you'll need to access the brake light signal at a location other than at the brake light switch. You can tap into the circuit at the CHMSL (center high-mount stop light) or at one of the two main brake lights and run that wire back to the controller's RED input trigger wire. My contact at Curt confirmed this and that you do not...
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• Will Curt Tail Light Converter Work for Separated Brake Light on Tow Vehicle
• It sounds like the Curt Tail Light Converter # C56236 will definitely fix your problem. This wiring kit has provisions for a separated brake light circuit and it combines it in with the turn signals like what your standard trailer does. For this wiring kit you'll need to connect the following wires to the following functions: Brown - Running Green - Right Turn Yellow - Left Turn Red - Brake White - Ground Black - 12V Power (pulls power from battery to power trailer lights)
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• Flashing Trailer Lights with a 2008 Mercedes GL450 with Factory Tow Package
• It sounds as if you have the trailer ruled out as the problem. I would recommend you check the ground connection on the trailer, to make sure it is connected securely to clean metal, so you eliminate that as a potential problem. I would then look at the connector on the vehicle. Try using a tester, part # C73NR to check if all circuits are functioning. If you find a problem at the connector, since the tow package is factory, not aftermarket, I would recommend you check with your Mercedes dealer.
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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 7 Way to 4 Pole Adapter for 2008 Mercedes-Benz GL450
• You will need part # C35FR. This adapter is recommended with most German vehicles, especially if you are pulling a trailer with LED lights. This adapter will plug into your factor 7 way on your tow vehicle and allow you to plug in back here either a 4 way or a 5 way connector on a trailer. The adapter has built in load resistors that create more draw.
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• Troubleshooting Trailer Lights Not Working with Headlights on 2010 Mercedes-Benz M-Class Bluetech
• So the problem that you're experiencing has to do with either a bad ground OR your trailer lights are overloading your vehicle circuits. The first thing to do is to check all of your grounds on your trailer and your vehicle side that are related to the lights. Make sure that they are securely connected to a clean, bare-metal surface. Rust, corrosion, or even some paint can cause a bad ground connection. If all of those look good then we'll need to move on to your circuits being overloaded.I'm...
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• Troubleshooting MaxxFan Plus Roof Vent
• According to the manufacturer's instructions three beeps and a green light on the MaxxFan Plus Roof Vent # MA00-04000K indicates you have entered Auto Mode so that all seems normal. However, if the light is on but the fan has stopped working that is most likely a sign that the circuit board has failed and needs to be replaced. For MaxxAir model 4000K you'd want to use Replacement Printed Circuit Board for MaxxAir Manual Lift RV Roof Vents # MA10A21276K.
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• Trailer Lights Not Working on a 2008 Mercedes-Benz GL320 With ModuLite Ultra Protector 119192
• The ModuLite Ultra Protector Wiring Harness w/ Integrated Circuit and Overload Protection # 119192 has a re-settable short circuit and overload protection built in that protects itself and your 2008 Mercedes-Benz GL320 from electrical shorts and mis-wiring problems. This means that it will shut itself off and restart instead of allowing a fuse to blow. Since you have tested the functions on 7-Way of your GL320 and they seem to all be operating properly the problem is most likely on your...
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• LED Trailer Tail Lights Will Not Work when Connected to a 2009 Mercedes GL550 with Factory 7-Way
• There is an issue with German vehicles (Audi, Mercedes, Porsche, BMW, Volkswagen, and so on) and trailers with LED lights. The LED trailer lights do not offer enough draw on the system for the lights to work. On a lot of these vehicles you will also get a bulb-out warning in the vehicle. The solution is to use an adapter that has load resistors in it, # C35FR, to provide enough draw so the lights will work and so you will not get that bulb-out warning. The adapter will go from a 7-Way...
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