Secondary air pump/relay??
07-23-2017, 12:37 PM
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11 C300
Secondary air pump/relay??
I had the secondary air injection pump go out on me. So I replaced it with a new Bosch one and at the same time I replayed the relay with an OEM Mercedes one. But my check engine light is still on and it doesn't sound like the pump is coming on on cold starts. Any suggestions? Thanks in advance!
