NOS R107/C107 Premerger AMG Lowering Springs – New Old Stock

These NOS Premerger AMG Springs were engineered specifically for the R107 SL-Class and C107 SLC-Class, representing a rare untouched set of genuine AMG suspension components from the pre-merger era. Designed during the period in which AMG operated independently from Mercedes-Benz, these springs are highly sought-after due to their authentic tuning characteristics, original AMG markings, and direct compatibility with all R107 and C107 chassis vehicles.

This complete set includes all four springs, each wearing its original AMG stickers and premerger part numbers, verifying authenticity and heritage. These springs have never been installed or used, qualifying them as true New Old Stock (NOS)—a level of originality that has become exceedingly rare for pre-1990s AMG components.

Specifications

Manufacturer: AMG (Premerger, West Germany)
Condition: NOS – New Old Stock, never installed
Application: Mercedes-Benz R107 SL-Class / C107 SLC-Class
Era: Premerger AMG (1980s)
Set Includes: 4 AMG-stamped springs (2 front, 2 rear)
AMG Part Numbers:

• 107-320-001-5

• 107-320-001-6
  Original AMG Stickers: Present on each spring
  Ride Height Drop: 25–30mm (approx. 1–1.2 inches)
  Spring Type: Progressive rate
  Performance Characteristics:

• Firmer, more responsive handling

• Reduced body roll

• Balanced lowering stance

• Retains comfort and refinement
  Fitment:

• Direct bolt-on

• Fits all R107 and C107 models from 1971–1989
  Intended Use:

• AMG-optioned vehicles

• Restoration, refinement, or performance upgrade

• Ideal for collectors seeking authentic premerger parts

The springs were engineered by AMG to deliver a lower, more aggressive stance while refining vehicle dynamics far beyond the factory setup. Designed to reduce ride height by approximately 25–30mm (1.0–1.2 inches), they provide a visually balanced profile and a firmer but still comfortable ride. The springs feature progressive spring rates, meaning the initial compression remains compliant during regular driving, while firmer compression engages during spirited driving, improving road feel and high-speed stability.

These springs were produced specifically for the R107/C107 platform, offering direct bolt-on fitment with no modifications required. The part numbers present on the springs—107-320-001-5 and 107-320-001-6—identify them as authentic premerger AMG components tailored to AMG-optioned R107 and C107 vehicles of the period.

Due to their originality, unused condition, and perfect fitment for all 1971–1989 SL and SLC models, this set is an exceptional upgrade for collectors, restorers, or anyone seeking genuine period-correct AMG handling and aesthetics. True premerger AMG suspension parts are extremely hard to source, especially in NOS condition, making this set a standout choice for concours-level restoration or performance enhancement.

Detailed

This set of NOS R107/C107 Premerger AMG Springs represents one of the most desirable suspension upgrades available for the classic 1971–1989 Mercedes-Benz SL and SLC chassis. AMG originally produced these springs in the 1980s as part of their proprietary suspension packages, offering improved handling, a more controlled ride, and a lowered stance for AMG-modified vehicles.

Premerger AMG components are distinctive because they were built in an era when AMG operated independently, before integration into Mercedes-Benz in the mid-1990s. This era produced some of AMG’s most iconic conversions, making authentic mechanical components from that time increasingly collectible.

These springs retain all original AMG stickers, coding, and identifiers. The visible part numbers—107-320-001-5 and 107-320-001-6—confirm their application and authenticity. The fact that these springs are NOS places them in a category above typical used components: the metal retains its original finish, AMG markings remain unweathered, and the springs have never been installed or compressed under vehicle weight.

Premerger AMG designed these springs using progressive-rate engineering, meaning the coil spacing and density vary along the spring length. This provides a blend of comfort and performance: soft enough to retain the luxurious ride expected from a Mercedes-Benz of the era, but firm enough to prevent excessive body roll and improve handling response.

The estimated 25–30mm (1.0–1.2”) drop lowers the vehicle into a visually striking yet functional stance. AMG tuned this drop to maintain proper suspension geometry, shock travel, and driveline angles—avoiding the harshness and compromises often found in aftermarket lowering springs. The result is a more planted driving feel, improved agility, and enhanced aesthetics without sacrificing daily drivability.

These springs fit all R107 SL (280SL, 300SL, 350SL, 380SL, 420SL, 450SL, 500SL, 560SL) and all C107 SLC models (280SLC, 350SLC, 380SLC, 450SLC, 500SLC), making them ideal for both U.S. and European-spec vehicles. Installation is fully compatible with the factory shocks or with period-correct performance dampers.

For restorers seeking originality, AMG enthusiasts building tribute cars, and collectors wishing to preserve the authenticity of AMG-equipped R107/C107 vehicles, this NOS spring set provides an unmatched combination of rarity, engineering pedigree, and plug-and-play usability.