Mercedes-Benz C250 won't turn on, requires new alternator on Mercedes-Benz C250

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Mercedes-Benz C250 owners report experiencing starting failures due to various issues, including a dead battery, which is one of the most common reasons for the vehicle not turning on. Additionally, some owners find that a malfunctioning alternator may not generate enough electricity to keep the car running, leading to similar starting problems. Furthermore, a faulty starter motor or starter relay can also prevent the vehicle from starting. While replacing the alternator may resolve the starting issue in some cases, it is crucial for owners to consider other potential causes, such as the battery and starter, to ensure a comprehensive solution to the problem.

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