Product Description
1981-1990 Mercedes-Benz 500 SEC, Driver & Passenger Seat Belt Kit
- Driver and passenger seats
- Retractable three-point belts
- End release buckles
- Hardware included
- FMVSS 209 and 302 rated
The C126 500 SEC is a grand coupe with pillarless windows and a strong V8, and its cabin is meant for long, relaxed drives. Seatbelt Planet's kit for 1981-1990 cars covers the driver and passenger positions with three-point lap/shoulder belt on a reels and end release buckles, and the hardware is included.
Where It Fits
Listed for the front seats of 1981-1990 Mercedes-Benz 500 SEC coupes.
Color Options
Choose from 52 colors, 13 premium.
Why Replace Old Belts?
The SEC's long doors make the belts hard to reach, and many cars use powered belt presenters. Original webbing in these cars is often worn, and fresh belts restore a tidy look.
Care Tips
Wash with gentle soap and allow slow retraction.
About the Mercedes-Benz 500 SEC
Mercedes built the SEC coupe on the S-Class platform with a pillarless hardtop design, and the 500 SEC was a flagship of the range through the eighties.
Pre-Install Checklist
Look over each SEC anchor and clear its threads.
Good to Know
Belts for both front seats.
End release buckles are simple and familiar.
The webbing color can be matched to the original leather or velour interior.
New belts are a meaningful improvement in a car this comfortable.
Reels keep both straps near the trim.
The 500 SEC's front seats are wide and comfortable, and retracting belts let both occupants move freely.
Hardware comes with this SEC kit.
The C126 coupe was built from 1981 to 1991 and remains a favorite of Mercedes enthusiasts.
End release buckles are easy to use.
Choose a color that matches the leather or velour interior.
In a coupe this plush, new belts are a worthwhile touch.
The 500 SEC was a flagship coupe, and its interior was built to a high standard. Many cars use powered belt presenters that hand the belt to the occupant, a feature that reflects how carefully Mercedes thought about the long doors of this car.
Fresh belts in the right shade restore the cabin's look, and the reels draw each strap neatly back once it is unbuckled.
The 500 SEC is one of the most admired Mercedes coupes, and owners take pride in keeping them in top condition.
The pillarless design of the SEC means there is no B-pillar between the windows, so the belts mount low and the long doors make them hard to reach without a presenter. Fresh webbing and smooth reels help the whole system work as intended.
Seatbelt Planet lists this kit across 1981-1990.
Choose your webbing color carefully, because the SEC's cabin colors are often quite specific, such as palomino, cream or blue-gray.
The SEC's long, heavy doors and wide sills make the belts sit further back than in a sedan, so smooth reels matter.
Fresh belts suit the calm, polished feel of this coupe.
Frequently Asked Questions
Retractable?
Yes.
Buckle?
End release.
Hardware?
Included.
Years?
1981-1990 Mercedes-Benz 500 SEC.
Body style?
Coupe.
Front seats?
Yes, driver and passenger positions.
Questions about fit?
Call 574-226-6676.
1981-1990 Mercedes-Benz 500 SEC, Driver & Passenger Seat Belt Kit specifications
- Seatbelt Planet aftermarket seat belt / restraint product (application per listing title)
- Vehicle application from listing: 1981-1990 Mercedes-Benz 500 SEC, Driver & Passenger
- Kit listing — see overview for which seating positions / belt count are included
- Tested and certified to meet FMVSS 209 and FMVSS 302 (certification tag on belts)
- Sold as aftermarket replacement — confirm buckle style, retractable vs fixed, and seat type before order
- Complete belts are preferred; mixing buckle/tongue brands is not recommended (components are designed to work together)
- 1-year manufacturer warranty for component issues from ship date (excludes abuse, accident damage, or disassembly)
- 90-day satisfaction guarantee per Seatbelt Planet (installed returns may incur restocking fee)
Installation Tips — 1981-1990 Mercedes-Benz 500 SEC, Driver & Passenger Seat Belt Kit
- Confirm this listing matches your vehicle (1981-1990 Mercedes-Benz 500 SEC, Driver & Passenger), seat type (bench vs bucket), and buckle/retractor style before installing.
- Inspect mounting points for solid metal structure. Seatbelt Planet products are aftermarket — fabrication or adapters may be required on some vehicles.
- Use appropriate grade hardware. Some listings sell mounting hardware separately.
- Install a complete belt assembly when possible; do not mix unmatched buckle and tongue brands.
- After install, verify full extension, retraction (if applicable), and latching before driving.
- If unsure, use a professional installer. Improper installation can cause serious injury.
Selection help: Seatbelt Planet FAQ / guides at seatbeltplanet.com/faq.html · phone 405-736-0088.
Vintage Car Radio does not offer installation.
1981-1990 Mercedes-Benz 500 SEC, Driver & Passenger Seat Belt Kit manuals
- Seatbelt Planet FAQ (FMVSS, warranty, returns)
- Seatbelt Planet common questions / selection help
- Use any instruction sheet packed with your order for model-specific steps
Manufacturer: Seatbelt Planet · 405-736-0088
One-Year Seatbelt Planet Warranty
Per Seatbelt Planet, seat belts are covered under a one-year manufacturer warranty for component issues from the date shipped. Warranty returns are not accepted if there has been obvious abuse, the belt was involved in an accident, or the belt has been disassembled / components removed.
Seatbelt Planet also states a 90-day satisfaction guarantee; installed returns may be subject to a restocking fee. RMA required — contact Seatbelt Planet or Vintage Car Radio at 844-802-4499 / 574-226-6676.
Vintage Car Radio does not install seat belts.
FAQ — 1981-1990 Mercedes-Benz 500 SEC, Driver & Passenger Seat Belt Kit
Are these FMVSS / DOT approved?
Seatbelt Planet states belts are tested and certified to FMVSS 209 and 302; the certification tag is on the belt.
Can I replace only one side?
Seatbelt Planet recommends installing a complete belt — buckle and tongue are designed to work together.
Will this fit 1981-1990 Mercedes-Benz 500 SEC, Driver & Passenger?
Match the years, make/model, and seat position in the title. Call Seatbelt Planet at 405-736-0088 if you need a custom belt.
Do you install?
No.
Need help?
844-802-4499 / 574-226-6676, or Seatbelt Planet 405-736-0088.
Specs
Installation Tips
Manuals
Warranty
One-Year Seatbelt Planet Warranty
Per Seatbelt Planet, seat belts are covered under a one-year manufacturer warranty for component issues from the date shipped. Warranty returns are not accepted if there has been obvious abuse, the belt was involved in an accident, or the belt has been disassembled / components removed.
Seatbelt Planet also states a 90-day satisfaction guarantee; installed returns may be subject to a restocking fee. RMA required — contact Seatbelt Planet or Vintage Car Radio at 844-802-4499 / 574-226-6676.
Vintage Car Radio does not install seat belts.
