Performance Ignition Coils for Mercedes-Benz CLS550 CL63 E550 (2017-2020) - 8 set

High-Output Performance Ignition Coils for 2017-2020 Mercedes-Benz C-Class, E-Class, CL-Class, SL-Class, GL-Class (M278/M157)

Replaces degrading factory ignition coils and spark plugs to restore optimal spark delivery, eliminate high-boost misfires, and stabilize idle in M278 and M157 V8 engines.

The Stock Mercedes-Benz M278 & M157 Ignition Shortcomings

The factory ignition coils in the 4.7L and 5.5L BiTurbo engines are notorious for premature thermal degradation due to extreme under-hood temperatures generated by the "hot-V" turbo configuration. Prolonged exposure to these high-heat cycles causes internal winding breakdown and epoxy housing fatigue. Under high boost loads, this electrical degradation leads to weak spark energy, causing spark blowout, cylinder misfires, hesitation during wide-open throttle (WOT), and rough idling, significantly reducing the volumetric efficiency and power output of these high-displacement V8s.

The Engineering Solution

This comprehensive 8-piece UF741 ignition coil and Bosch spark plug set is engineered to withstand the extreme thermal environment of Mercedes-Benz BiTurbo engines. The coils feature upgraded primary and secondary copper windings that deliver higher voltage output, ensuring complete and rapid combustion even under peak boost pressures. Encased in high-grade, heat-resistant dielectric epoxy and rigid polymer housings, these coils resist thermal shock and prevent electrical arcing to the cylinder head. Coupled with direct-replacement Bosch spark plugs, this service kit provides a stabilized, high-intensity spark arc that strictly prevents blowout, restores throttle response, and smooths out the power band for consistent engine performance.

Technical Specifications

Compatibility

• 4.7L Engines
• Mercedes-Benz CLS550 2017-2018 4.7L
• Mercedes-Benz E550 2017-2017 4.7L
• Mercedes-Benz GLS550 2018-2019 4.7L
• Mercedes-Benz SL550 2018-2020 4.7L
• 5.5L Engines
• Mercedes-Benz CLS63 AMG S 2017-2018 5.5L
• Mercedes-Benz G63 AMG 2017-2018 5.5L
• Mercedes-Benz GLE63 AMG 2018-2019 5.5L
• Mercedes-Benz GLE63 AMG S 2018-2019 5.5L
• Mercedes-Benz GLS63 AMG 2018-2019 5.5L
• Mercedes-Benz SL63 AMG 2018-2018 5.5L

The Mercedes-Benz Precision Standard

Designed to meet exacting European engine management standards, this ignition service kit ensures flawless communication with the factory ECU. By delivering precise coil dwell times and optimal resistance matching, it guarantees consistent power delivery without throwing random misfire codes or triggering Check Engine Lights (CEL).