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  1. Tow Bar Base Plate
  2. Roadmaster
  3. Removable Draw Bars
  4. Twist Lock Attachment
  5. Partially Hidden
THIS ITEM IS NOT A FIT FOR
2003 Mercedes-Benz S-Class
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Roadmaster

Roadmaster Direct-Connect Base Plate Kit - Removable Arms

Part Number: RM-521194-5
In Stock
$575.00
Retail:$632.50
You Save: $57.50
Tow Bar Base Plate
Not Confirmed to Fit

2003 Mercedes-Benz S-Class

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etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
Designed for use with motor-home-mounted tow bars, the direct-connect brackets are virtually invisible, easy to mount and remove, and they eliminate the need for a quick-disconnect crossbar on your tow bar. Installs on your vehicle's frame. Great Prices for the best tow bar base plate from Roadmaster. Roadmaster Direct-Connect Base Plate Kit - Removable Arms part number RM-521194-5 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Roadmaster Tow Bar Base Plate - RM-521194-5

Highlights

  • Custom Fit for Your Vehicle: Mounts to existing attachment points
  • Ready for Flat Towing: Direct-connect brackets create solid attachment points for a motor-home-mounted tow bar.
  • Blends In When Not Towing: Hidden brackets sit back in the grille for a clean, barely visible look.
  • Fast Hookup and Release: Twist-lock removable arms click into place and pull out quickly when done.
  • Built to Last: Computer-cut all-steel construction with black powder coat resists corrosion and wear.
  • Simple Setup: Installs on the vehicle’s frame with included hardware—no welding required.
Made in USA

Features to know about

Built for a Clean Front End: Hidden Design with Removable Arms

If you like keeping your vehicle’s front end looking stock when you’re not towing, this setup makes it happen. The direct-connect brackets sit farther back than standard mounts, so once the drawbars are removed, the remaining brackets are virtually invisible within the grille. There’s no quick-disconnect crossbar sticking out, which means nothing to bump your knees on and a cleaner overall look.

Quick Connections Every Time: Twist-Lock Removable Drawbars

Hooking up takes only a few seconds. The arms insert straight into the brackets, twist to lock, and click securely in place. Built-in pull rings let you unlock each arm so you can twist and remove it just as easily when you’re done. The result is a simple, repeatable connection that saves time whether you’re setting up or breaking down camp.

Strength That Lasts: All-Steel Construction with Powder Coat Finish

These base plates mount directly to the vehicle frame for solid strength without welding. Each piece is computer-cut from steel for precision fitment and finished with a black powder coat that resists corrosion. The heavy-duty build gives confidence for long-distance towing and holds up to miles of road wear.

Straightforward Install: Bolt-On Kit with Included Hardware

Everything needed for mounting is in the box—no welding required. The hardware and instructions guide you through a simple bolt-on installation that secures firmly to factory points on the frame. Once it’s in place, you have a reliable connection ready for your next trip.

Built to Match Your Setup: Roadmaster Tow Bar Compatibility

This direct-connect base plate works exclusively with motor-home-mounted Roadmaster tow bars that slide into a trailer hitch, including the Nighthawk, Sterling, Blackhawk, Blackhawk 2, Falcon, or Falcon 2 models. It’s a precise system designed to integrate smoothly with those bars for safe and consistent towing performance.

Specs

Features

  • Direct-connect brackets: Provide attachment points for your motor-home-mounted tow bar
  • Streamlined design: Creates supremely clean look
  • Quick-disconnect crossbar: No obtrusive quick-disconnect crossbar
  • Hidden brackets: Sit even farther back than standard brackets
  • Drawbars: Attach and remove quickly and easily
  • Arms: Click to lock in place in brackets
  • Built-in pull rings: Let you unlock arms so you can twist and remove them
  • Computer-cut, all-steel construction: Provides exceptional strength
  • Black powder coat finish: Durable and corrosion resistant
  • Installation: Simple installation - no welding required
  • Custom base plates: Ensure a perfect fit for your vehicle
  • Compatibility: Compatible with Roadmaster motor-home-mounted tow bars only
  • Included items: Instructions and mounting hardware included
  • Origin: Made in the USA
  • Warranty: Limited Lifetime Warranty

Note

Note: Roadmaster direct-connect base plates will only work with Roadmaster tow bars that slide into a trailer hitch, such as the Nighthawk, Sterling, Blackhawk, Blackhawk 2, Falcon, or Falcon 2. These base plates will not work with tow bars that require a hitch ball.

521194-5 Road Master EZ-5 Base Plate Kit

Installation Details RM-521194-5 Installation instructions

This Product Fits The Following Vehicles




Ratings & Reviews

4.8

3638 reviews
5 Stars
(3173)
4 Stars
(311)
3 Stars
(64)
2 Stars
(30)
1 Star
(60)
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Designed for use with motor-home-mounted tow bars, the direct-connect brackets are virtually invisible, easy to mount and remove, and they eliminate the need for a quick-disconnect crossbar on your tow bar. Installs on your vehicle's frame.

by:

I originally purchased a Blue Ox baseplate to install since I already had a tow bar. Upon removing the front grill, I was surprised to find the used Element I had purchased already had the front bumper caps removed and 2 braces installed. Thanks to the photos on etrailer reviews and product info, I was able to determine that the vehicle had previously had a roadmaster baseplate installed! I purchased this unit and it fit perfectly onto the already installed braces. Seems very solid and high-quality so far.



by:

A clean look on my 2025 Ford Maverick Hybrid after following e-trailer's detailed installation instructions.



by:

Installation was fairly straightforward, kudos to e-trailer for the videos, looks great, everyone says it looks factory installed, love the low profile base plate without the bar, also love that the hook ups are detachable and can be removed when not towing, gives it an overall cleaner look. Installed it right at the campground without issues, took about 3 hours to install, with our rubicon only had to widen the top holes as the second set of holes were already the size of the bolts needed. This is the 3rd base blare we have installed and they get easier each time.



by:

Put this on a 2014 Honda CR-V. This is a very well made base plate setup! The overall design, welds and powder coating are outstanding! Shipping was super fast too! The install video by etrailer was close to perfect and really helped to take the "scary" out of doing the job. The only change I would like to see in the video is during the grill removal. He says to just yank it forward to get the clips to release. Unfortunately, most of the specialized clips broke doing it this way. Had I known, I would have slipped a thin tool just below the grill to get the clips to unlock/release. Also, on the wrap around, bumper cover, some of the tabs on the bumper cover ripped out and I had to do some creative plastic welding or fiberglass resin/cloth to repair. These clips have a release tab also. I suggest finding specific videos on youtube to remove the plastic body parts and grill. I got it all done and it works perfectly! I really love the almost invisible tow receivers on the car (when the arms are removed). Our last toad was a 1997 Nissan Hardbody pickup that has permanent knee busting/shin smashing protrusions. I am super happy with everything we have bought from etrailer over the past 18 years!



by:

The folks at etrailer are fantastic. I didn't know everything I needed to tow my car behind our RV... but they did! Everything I needed was in the boxes and the videos made it all come together. Thank you to everyone at etrailer!



by:

It mounted up just as the instructions said it would. From previous research I was not surprised when some of the mounting did not align perfectly. Had to use a dremel tool to make it work. The product looks very sturdy from its design. I’m happy with it and look forward to RV traveling.



by:

Good product. If you are reasonably handy and have some tools, you can install this yourself in a few hours. I'm a mechanic, it took me a little over 2 hours to install on my own toad. The fit is good, there are 4 holes you have to drill, otherwise it is plug and play. When you insert and twist lock the tow bar mounts into their sockets they feel a little sloppy but they are secure, and i never noticed any rattle when towing. Overall i give it a 4 out of 5 for easy install and clean look after install. Pic included of installed base plate.



by:

This was a bit of a challenge to install on a 2026 Chevrolet Colorado Z71. One item to be aware of, as you take off the front Facia of the truck for the install, there are two Facia "brakets" that attach to the front fenders that seem like they are use once plastic snaps. Three of the 4 snaps broke off on both sides when I removed the facia. These are about $35 a piece from Chevy and prevent you from making this a 1 day job. Additionally, there are 2 7mm screws/bolts that connect one of the coolers to the back of the bumper support and these are a real problem to get back in - over an hour of time and every 1/4" tool in my arsenal was needed to find a way to get these started. Finally, one of the Connecting Plates (Passenger side) needed to holes to be elongated to enable all the bolts to be started. Finally - you need to put the Brakaway bracket on the driver side, to have enough cable to reach you brake system. Probably have 4 hours in the disassembly and installation of the Direct-Connect Plate. Now waiting a couple days for the plastic brackets from Chevy to complete the install. Good Luck!!



by:

Very fast shipping, and the install was easy. Great product



by:

Awesome instructions! Install was fairly easy. Product is very high quality and solid construction. Thank you E Trailer!



by:

I installed this base plate on a 2018 Miata RF. I think I recall something about it taking 3.5 hours and my initial estimate was 3.5 days. It actually took a bit longer than that, but I was not pushing myself and did not have the luxury of having the vehicle on a lift but had it up on two ramps for the front wheels.

The order came pretty quickly, probably about 4 or 5 days between the time I placed it and UPS delivered it. The parts were well packaged and it came with a printed set of instructions. I had watched the video install on another Miata and if it weren't for that I'm not sure I would have tried it. I'm not a pro mechanic by any means but have worked on my own vehicles now for over 40 years. And I'm not a spring chicken either, so all the up and down working on the car can tire me fairly quickly. But if you are not in a rush and go carefully it can be done.

It took a day to do most of the disassembly. I removed both headlights and the intake tube on the passenger side. That tube came out much easier then it went back in.

The next day I got the baseplate mounted which helped to start visualizing how it all would work. All of the holes for the 6mm bolts did not quite line up with the holes in the frame. I had to file one sides worth for a bit of extra clearance. From my experience on this install you really want to leave all the bolt on the loose side till you get everything situated.

A couple of days off for rain and the then I got to work on the bracing. Initially I though I didnt need to cut the top lip of the frame but I decided to go ahead and do it anyway since that part didnt seem to sit flat when bolted from the back end. I'm still not sure its really necessary as the hump clears the metal lip without cutting it.

I also ordered a 14" long 1/2" drill bit to cut the holes in the frame. It was a Bosch bit, wasnt very expensive and it went through the metal like the proverbial hot knife. I managed to get all the big bolts installed in a day with a great sense of satisfaction.

The next day I torqued down all the bolts and the mount felt very solid. They stress that you need to install all the bolts, but honestly I can't see the 6mm bolts doing much compared to the half inch bolts that do most or all of the work. But I put them in and tightened them all the same.

A couple of days spent to install the tail light wiring and then I got back on to putting the front clip back on. My car must have had an aftermarket grill since it did not match the pictures or the video. I tried to position it carefully to see where the parts that were going to stick out would be so I didnt cut out more than I needed to. So there was a good amount of back and forth, cut and fit. In the end I had to make some extra cuts for clearance for the safety cable tabs as well as the mount for the 6 wire connector. Until I made the extra cuts the lower part of the front clip would not seat correctly. Getting the clip in the right position so it fits under the lights also takes some finagling.

Figuring out where all the bolts go back in can be interesting. Take pictures where you can. Dont be too aggressive when working with plastic parts. Overall I'm satisfied with the install, but I have yet to try and hook it up to tow.



by:

Easy to install needed to replace some fasteners as they broke removing front grill was able to get them from Amazon cheap



by:

Easy installation! Etrailer videos are very informative and helpful! Always great to have a helper too!



by:

This Road Master Direct connect base plate works perfectly for a 2020 ford transit cargo 250! Awesome service from etrailer as usual! The finished product can barely be seen through the front fascia!



by:

It was shipped promply. I installed it myself using the included step by step instructions and videos from etrailer. It all went well (though I had to come back and reconnect the sensor plug- my bad).
I tow a Jeep Grand Cherokee Trailhawk and this base plate is nearly invisible when not towing. Works well.



by:

I bought and installed this tow plate one year ago on my 2013 Jeep Wrangler. I bought this particular plate due to the jeep having a Barricade off-road bumper. This plate attaches a bit lower than other plates and prevented having to modify the bumper. Installation was easy involving only hand tools. The plate comes with all needed bolts and attachments. I have towed this Jeep several thousand miles behind my RV with absolutely no issues. As an aside, I use a Roadmaster Night Hawk tow bar which is also an excellent product. Both are expensive, but I believe cheaping-out on safety is no a good idea. I highly recommend this product.



by:

This works perfect with my Roadmaster tow bar. It was a little difficult to install since I had to remove the front end of the Trailblazer, but with the good directions that came with it and some you tube videos made the installation easier.



by:

Had these installed at Lester’s Automotive in Boerne,Texas…First class service all the way. Paul and his crew worked through lunch for over 4 hours to install these on our 2026 Ford Ranger. Also ran the wire and hooked up my auxiliary tow lights. The price for this was very reasonable and would highly recommend them for all r.v. needs even if not real close to the Boerne area. R.V park within reasonable distance if needed.



by:

Etrailer comes through again! This was a great savings as a used kit, but it was even better than the description online. I have installed (4) baseplates on and etrailer.com has given me great videos to watch and good instructions to follow. Couldn't be more pleased with the quality, service and delivery times.



by:



by:

It does what I needed it to do and it was easy to install on my 2016 Corolla.



by:

A little tough to drill side holes in frame, but worked well.



by:

Perfect fit and so easy to install myself. Just need some precaution not to scratch the bumper cover.



by:

I did the install myself. The instructions are easy to follow and there was also an online video of installation for my car.(Toyota Corolla).



by:

Ordered quite a few items from etrailer for my RV and Flat tow setup. Excellent shipping times and email follow ups. 5 Stars for etrailer. Road Master base plate gets 4 stars just because quality control lacks a bit. Works good but one of the tubes for the removable arms was welded about 5 degrees off level so I have had troubles detaching the non binding tow bar


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See what our Experts say about this Roadmaster Tow Bar Base Plate

  • Parts Needed to Flat Tow 2016 Toyota Corolla with Manual Transmission Behind Another Vehicle
    The online owner's manual for your 2016 Toyota Corolla indicates on pages 162-163 that the version with manual transmission CAN be flat towed behind another vehicle but that the automatic transmission version CANNOT be towed 4-wheels-down. For the towable manual model the procedure to prepare the car for this process is noted on page 163. I suggest checking your own printed manual just in case it offers different and/or additional information. Check the index under "T" to find the towing...
    view full answer...
  • Recommended Components To Flat Tow 2014 Toyota Corolla Behind A Motorhome.
    I can certainly make some recommendations that will work for you. When flat towing you need base plates on the towed vehicle, a tow bar, safety cables, lighting for the towed vehicle and most states now require a supplemental brake system. If you have a manual transmission in your Corolla I recommend the RoadMaster EZ5 Base Plate Kit, part # RM-521194-5. This has removable arms that make the brackets almost invisible when the arms are removed. The tow bar you referenced, the Falcon,...
    view full answer...
  • How To Setup a 2018 Toyota Corolla SE Manual for Flat-Towing
    In regards to setting up a vehicle for flat-towing, you'll need to refer to the owner's manual as this is not something we can advise on. If you need clarification on the owner's manual, you'd need to reach out to the manufacturer. In order to flat-tow a 2018 Toyota Corolla you'll need a base plate, tow bar, flat-tow wiring harness, and supplemental braking system. I have attached my recommendation for each of the following below. Roadmaster Direct-Connect Base Plate Kit part # RM-521194-5 Roadmaster...
    view full answer...
  • Roadmaster Falcon 2 Tow Bar Replacement Crossbar
    The replacement crossbar you are needing for your Roadmaster Falcon 2 tow bar is the part # 910021-00.
    view full answer...
  • Parts Needed to Flat Tow 2015 Toyota Corolla with Manual Transmission
    There are a number of parts needed in order to flat tow your 2015 Toyota Corolla, which I'll list for you: - Base Plate Kit: Roadmaster Direct-Connect Base Plate Kit # RM-521194-5 - Tow Bar: Roadmaster Falcon All Terrain Tow Bar # RM-522 - Safety Chains: RoadMaster 68" Single Hook, Coiled Safety Cables # RM-643 - Wiring Kit: Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267 - Supplemental Braking System: SMI Stay-IN-Play DUO Supplemental Braking System # SM99251 OR if...
    view full answer...
  • Parts Needed to Flat Tow 2015 Toyota Corolla
    We have base plate kits and tow bars that fit your 2015 Toyota Corolla but Curt does not have a custom fit option so that is not the route I would recommend. We only have fits for the manual transmission models but the Roadmaster Direct Connect kit part # RM-521194-5 is the way to go. In addition to the base plates, you will also need a compatible tow bar, safety cables, lighting, and supplemental braking to flat tow your vehicle. The most popular compatible tow bar is the Falcon All...
    view full answer...


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Joshua S
Video Edited:
Joshua S
Employee Tammy D
Written by:
Tammy D
Employee Shelly K
Updated by:
Shelly K
Employee Wilson B
Updated by:
Wilson B
Employee Mike S
Updated by:
Mike S
Employee Isabelle B
Updated by:
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Employee Amanda K
Updated by:
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Employee Jonathan Y
Video by:
Jonathan Y
Employee Robert C
Test Fit:
Robert C

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