What could be this sound (attached)?
Dear All,
After purchase of my E200 (mopf, petrol, 24000km, after MB maintenance at 23500km) I recognized that its engine makes unexpected, IMHO, sound when it is cold. It sounds like metal knocking+a bit of yelping.
The sound disappears after warming up.
I don't remember that the sound appeared when the car was started up in the dealer's showroom at +17...+18C, but it is repeatable and recognizable around 0C.
What could this be? Its rate depends on the engine's rpm, but a few times less than the rpm.
You may find the sound attached in mp3 format. It was recorded inside my garage box this morning.
By the way, surprisingly I found that this higher frequency sound may not be heard on some PC players (cleaned by noise reduction???), but my phone and another PC definitely deliver it.
I would appreciate your opinion, but also I plan to visit MB dealer today afternoon.
Danke 🙂.
Beste Antwort im Thema
Ok, I'm not sure is this post could be read by anyone at its new location as "MOTOR-TALK forum in English" does not look very popular 🙂.
But anyhow I'm reporting on the results" generator belt replacement + engine FW update solved the problem (tested @ two mornings).
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Still there is no sound.
The issue seems to be closed.