Engine rattles on acceleration

What is your question?

When I accelerate, my engine pings. I have change sensors, battery, air intake manifold, oxygen sensors, map sensor, ignition coil, injector nozzle, maf sensor,catalytic converter, and even change motor engines, still the noise continues. There is no check engine light .

What makes this problem better or worse?

It’s worse when engine is at operating temperature

How long has your 2011 Mercedes-Benz GLK350 had this problem?

Almost a year