The M119 V8's plastic cam oilers are the engine's signature weak point, producing a threaded ticking noise on cold start when they crack. Owners treat this as a cheap, easy preventive job replacing them with metal units, and consider it a point of information rather than a value detriment. …
M119 V8 plastic cam oilers and start-up ticking
Mercedes-Benz S-Class Coupe / CL (C140) · mechanical