Spark Plug Change?

[C280 JR]

How often are you supose to change spark plugs?

Elvir

[Andrew C280]

what year is the car ?
platnium 100,000 to about 120,000 km
regular 50,000 km

[marksbenz]

I change mine every 15k miles. I only use oem Bosch.

[SpEeDy230]

Every 20k, OEM Bosch