For enthusiasts looking to elevate the performance of their 500 Sec Mercedes, several key modifications can unlock its true potential. Starting with engine management, consider an aftermarket EFI kit from Elbe Engineering for M116, M117, or M119 engines. These kits, typically starting around $10,000, offer a significant leap in engine control and tunability compared to the original KE-Jetronic system. For those wishing to retain the classic KE-Jetronic but enhance its capabilities, laptop tuning solutions are available from dkubus.com, offering a blend of vintage feel with modern precision.
To complement EFI upgrades, optimizing the drivetrain is crucial. A higher stall torque converter, achieved through modification, improves off-the-line performance. Swapping the differential to a Limited Slip Differential (LSD) with a 2.47 ratio from a 560 SEC or a more aggressive 2.65 ratio from a Euro-spec 560 SEC further enhances traction and acceleration, translating to a more dynamic driving experience in your 500 SEC Mercedes.
For simpler, yet effective enhancements to your 500 SEC Mercedes, explore intake and exhaust modifications. A K&E air filter, readily available on eBay, improves airflow to the engine. However, for a truly transformative upgrade, a custom exhaust system, built to specifications mirroring AMG’s original designs, is highly recommended.
Magnaflow, when tasked with creating an exhaust for a Mercedes-Benz WB project on Wheeler Dealer, invested significant research and development to replicate the AMG sound and performance. The result was exceptional. By following the exact specifications of this build, you can achieve a similar deep rumble and substantial performance gains for your 500 SEC Mercedes.
The recommended Magnaflow system configuration includes:
- Stainless steel pipe size: 2.25 inch
- Front muffler: Magnaflow 4×9″ dual-in/dual out 2.25″ straight-thru (11-inch case length) – Part number 11378 (natural S/Steel) or 14378 (polished s/steel).
- Rear muffler: Magnaflow 4×9″ 2.50″ dual in-dual out with internal cross-over (14-inch case length) – Part number: 11386 (natural s/steel) or 14386 (polished s/steel).
This exhaust system dramatically improves engine responsiveness and torque, making your 500 SEC Mercedes feel significantly more alive and powerful. The improved throttle response and enhanced engine sound create a truly rewarding driving experience. Consider these upgrades to unleash the full potential of your classic 500 SEC Mercedes.
