Mercedes-Benz 500SL Trailer Wiring Harness

Your Mercedes-Benz 500SL will be happy to know that the search for the right Trailer Wiring Harness you’ve been looking for is over! Advance Auto Parts has 2 different Trailer Wiring Harness for your vehicle, ready for shipping or in-store pick up. The best part is, our Mercedes-Benz 500SL Trailer Wiring Harness start from as little as $20.79.

When it comes to your Mercedes-Benz 500SL, you want parts and products from only trusted brands. Here at Advance Auto Parts, we work with only top reliable Trailer Wiring Harness brands so you can shop with complete confidence. Some of our top Trailer Wiring Harness brands are Hopkins and CURT. We’re sure you will get the right product to keep that 500SL running for a long time.

We even have reviews of our OEM and aftermarket Trailer Wiring Harness products to help you buy with confidence. Hear from other customers via the 8 reviews on parts for your Mercedes-Benz 500SL.

Shop online, find the best price on the right product, and have it shipped right to your door. If you prefer to shop in person for the right Trailer Wiring Harness for your 500SL, visit one of our local Advance Auto Parts locations and you’ll be back on the road in no time!

Compare 9 Mercedes-Benz Trailer Wiring Harness

Hopkins – 40955, Multi-Tow® FORD / GM 7 Blade and 4 Flat Wiring Kit (Part No.40955)

40955, Multi-Tow® FORD / GM 7 Blade and 4 Flat Wiring Kit

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$39.99
Tow more than one trailer? Multi-Tow® design feature adds multiple towing options from one connector by providing sockets for towing both 7 blade and 4 flat trailers. This connector is Plug-In Simple!® with no cutting or splicing, saving you time by utilizing an OEM connector to create an exact fit for easy installation and maximum weatherproofing.

Product Features:
  • Multi-Tow® provides multiple towing options from one connector
  • Plug-In Simple!® Wiring Kit
  • Utilizes OEM connectors create an exact fit and maximum weatherproofing
  • Includes mounting bracket and hardware
  • Impact and corrosion resistant
  • Fits in standard 7 blade bracket
  • Includes Step-By-Step Instructions
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Hopkins – Trailer Tail Light Converter: Protects Vehicle Electronics, Powers up to 5.0A (Part No.46255)

Trailer Tail Light Converter: Protects Vehicle Electronics, Powers up to 5.0A

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$70.99
Many of today’s vehicles do not possess the electrical means for powering the extra voltage requirements of a trailer. Power Taillight Converters units completely isolate the tow vehicle from trailer malfunctions. Power is taken directly from the battery for isolation and brighter trailer tail lights.

Product Features:
  • For vehicles equipped with independent bulb turn signals or common bulb systems
  • Protects tow vehicle electronics from wiring shorts
  • Includes 14 ga. power lead wire, fuse & fuse assembly, splices, and cable ties
  • Powers up to 5.0 amps per output
  • Receives power directly from the battery
  • Includes vehicle side 4 flat
  • Includes dust cover and grease packet to prevent corrosion
  • Includes Dust Cover And Grease Packet To Prevent Corrosion
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CURT – Dual-Output 7/4-Way Connector (Plugs into USCAR) (Part No.55774)

Dual-Output 7/4-Way Connector (Plugs into USCAR)

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$31.49
A CURT custom wiring connector (sometimes called a T-connector) is a simple, plug-and-play electrical device that eliminates the need for cutting, splicing and soldering when installing vehicle-to-trailer wiring. Most vehicles do not come ready to tow. Unless your vehicle has a towing package, it is probably not equipped with a trailer wiring connector. This is where CURT’s custom wiring connectors come into play. A custom wiring connector uses a single original equipment plug to plug into a special socket provided by your vehicle. Though this option is not available on every vehicle, some automotive manufacturers design their vehicles to be easily equipped for towing by supplying a socket, integrated into the vehicle’s electrical system, to readily accept a custom wiring connector. With a CURT custom wiring connector, there is no need to tap into the taillight assembly because a special socket is already provided. This special custom wiring connector actually provides two connector sockets for a multipurpose option. It plugs into an OEM connector and offers a 4-way flat and 7-way RV blade connector. It comes with a mounting bracket for easy installation and is designed to be a custom wiring option for a variety of vehicles (see application info to verify fitment). CURT custom wiring connectors are designed to be long-lasting and simple to install. They come with dust covers to keep your connector clean when not in use.

Product Features:
  • Plugs into USCAR socket to provide 4-way and 7-way trailer wiring connectors
  • Fits USCAR-equipped vehicles with factory tow plugs only
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
  • 7-way RV blade socket adds reverse lights, electric brakes and auxiliary power
  • Dust covers included to keep connectors clean when not in use
  • Slit loom keeps wires contained and well protected
  • Metal bracket securely mounts wiring to the vehicle or trailer hitch
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CURT – Dual-Output 6/4-Way Connector (Plugs into USCAR) (Part No.55664)

Dual-Output 6/4-Way Connector (Plugs into USCAR)

from

$46.49
A CURT custom wiring connector (sometimes called a T-connector) is a simple, plug-and-play electrical device that eliminates the need for cutting, splicing and soldering when installing vehicle-to-trailer wiring. Most vehicles do not come ready to tow. Unless your vehicle has a towing package, it is probably not equipped with a trailer wiring connector. This is where CURT’s custom wiring connectors come into play. A custom wiring connector uses a single original equipment plug to plug into a special socket provided by your vehicle. Though this option is not available on every vehicle, some automotive manufacturers design their vehicles to be easily equipped for towing by supplying a socket, integrated into the vehicle’s electrical system, to readily accept a custom wiring connector. With a CURT custom wiring connector, there is no need to tap into the taillight assembly because a special socket is already provided. This special custom wiring connector actually provides two connector sockets for a multipurpose option. It plugs into an OEM USCAR connector and offers a 4-way flat and 6-way round connector (see application info to verify fitment with your vehicle). It also comes with a mounting bracket for easy installation. CURT custom wiring connectors are designed to be long-lasting and simple to install. They come with dust covers to keep your connector clean when not in use.

Product Features:
  • Plugs into USCAR socket to provide 4-way and 6-way trailer wiring connectors
  • Fits USCAR-equipped vehicles with factory tow plugs only
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
  • 6-way round socket adds connection for electric brakes and auxiliary power
  • Dust covers included to keep connectors clean when not in use
  • Slit loom keeps wires contained and well protected
  • Metal bracket securely mounts wiring to the vehicle or trailer hitch
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Hopkins – Plug-and-Play Towing Wiring Kit with OEM Connectors (Part No.41155)

Plug-and-Play Towing Wiring Kit with OEM Connectors

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$25.99
Dont splice onto your vehicles factory wiring harness. Simply plug in this Hopkins? vehicle wiring kit featuring exact OEM matching connectors for a perfect weather-tight fit. This kit includes the accessories needed to get you towing faster.

Product Features:
  • Plug-In Simple? Wiring Kit
  • Utilizes OEM Connectors For Enhanced Fit And Weatherproofing
  • Includes Vehicle Side 4 Flat
  • Corrosion Resistant Terminals
  • Impact And Corrosion Resistant
  • Includes Dust Cover And Grease Packet To Prevent Corrosion
  • Includes Step-By-Step Instructions
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Husky Towing – 4 Way Flat And 7 Way Round, Utilizes Oem Connectors, 2 Door Connector Protection (Part No.33059)

4 Way Flat And 7 Way Round, Utilizes Oem Connectors, 2 Door Connector Protection

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$44.99
Husky Towing Products Offers Innovative Designs, High Quality, Custom Installation And Safe, Easy Operation. Husky Is Source For A Complete Line Of Hitches, Electrical Products And Towing Accessories.

Product Features:
  • Provides Multiple Towing Options From One Connector
  • Connects To Your Vehicle OEM Tow Package Connector
  • Exact OEM Replacement For Enhanced Fit And Maximum Weatherproofing
  • Applies To Over 18 Different Vehicle Makes Equipped With A Factory Tow Package
  • High Impact, ABS Plastic Construction
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CURT – Powered Converter Wiring Kit (10 Amps) (Part No.55151)

Powered Converter Wiring Kit (10 Amps)

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$20.79
When your vehicle does not readily provide an electrical connection for hooking up your trailer, CURT electrical converts offer the solution. Working tail lights on your trailer are absolutely essential any time you tow, and a converter provides an effective way to properly equip your vehicle for safe towing. A CURT electrical converter, much like our custom vehicle-to-trailer wiring harnesses, provides a trailer connector on your vehicle by slicing into the vehicle’s electrical system. Electrical converters are designed to splice directly into the taillight wiring, rather than plugging into various sockets, giving them the nickname “taillight converters”. Though it requires a little extra work compared to a custom wiring harness, a tail light converter offers a reliable, long-term connector solution. This converter wiring kit is intended to be used with various CURT powered taillight converters. Powered converters require a direct connection to the vehicle’s battery, and the powered converter wiring kit #55151 provides all of the components needed to establish a secure connection. The kit includes 20 feet of 12 gauge wire, a 10-amp fuse, an in-line fuse holder, a 3/8″ ring terminal, a butt connector, a 14-1/2″ cable tie and eight 6″ cable ties. This wiring kit is rated at 10 amps and comes included with CURT powered electrical converters #59146, #59187, #59190, #59200 and #59201.

Product Features:
  • Routes power from vehicle battery to powered converter
  • Designed for use with battery-powered electrical converters
  • 20′ of 12 gauge cross-linked wire for flexible installation
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Husky Towing – 7-Way Blade And 4-Way Flat, Plug-In Style (Part No.33058)

7-Way Blade And 4-Way Flat, Plug-In Style

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$53.99
Husky Towing Products offers a complete line of hitches, brake assemblies, jacks, sway control solutions, and essential towing accessories. Each Husky product is precision engineered, constructed with durable, quality materials, and is rigorously tested to industry safety standards. Hitches are what Husky does best. From Class III receivers, to 5th wheels, to weight distribution hitches, Husky hitches help keep your towables safe and secure. Husky also offers accessories to accompany your hitch including hitch balls, shanks, locks, and more Electric tongue jacks, electrical and brake products, and cargo carriers are just a few other categories that make any towing experience easier.

Product Features:
  • Connects To Your Vehicle OEM Tow Package Connector
  • Easy-Open, Weatherproof Lid With Rugged, Oversized Hinge Allows Lid To Open 180 Degrees
  • Impact And Corrosion Resistant
  • Plug-In Simple(R) , No Cutting, No Splicing, Saves Time
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Husky Towing – OE Styl 7Way Blade, With Quick Install(Tm) Connector, With 180Deg Reinforced Lid (Part No.30406)

OE Styl 7Way Blade, With Quick Install(Tm) Connector, With 180Deg Reinforced Lid

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$36.99
Product Features:
  • Allows For Didge Tructs To Adapt To The Quick Install(TM) 7 RV Blade
  • Reinforced Lid Opens 180 Degrees To Prevent Breaking
  • Ultimate Weatherproofing
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