Dealership: Purchase genuine Mercedes-Benz turn signal bulbs from a local authorized Mercedes-Benz dealership. They will have the exact parts recommended for your vehicle.
Online Retailers: Various online retailers, such as Amazon, eBay, and specialized automotive parts websites, sell turn signal bulbs. Read product descriptions and reviews to make an informed choice.
Check your owner's manual to confirm the specific bulb type required for your C230 Mercedes.