C450 crickets
Thread Starter
Newbie
Joined: Jan 2010
Posts: 12
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c 350
C450 crickets
Hi all, been away from this site for a bit.
I am hearing what I can describe as the sound of a cricket in a match box or dragon fly in a jar sound ping ponging back and forth from left then right a/c vents. It is not constant, but without the sound system on is annoying. Wish this would occur for the dealer. Others have commented about it. Has anyone else heard this or have a handle on what’s causing this? And no torturing bugs is not a hobby, but I was a kid once.
thanks in advance
I am hearing what I can describe as the sound of a cricket in a match box or dragon fly in a jar sound ping ponging back and forth from left then right a/c vents. It is not constant, but without the sound system on is annoying. Wish this would occur for the dealer. Others have commented about it. Has anyone else heard this or have a handle on what’s causing this? And no torturing bugs is not a hobby, but I was a kid once.
thanks in advance
Super Member
Joined: Aug 2004
Posts: 566
Likes: 5
2012 E350 4matic
This might be the fan motor for the AC/heater blower. Just a guess. See if it comes and goes based on temp. My old e350 had a chirp at about fan speed 2. Any higher it got drowned out or it might have stopped idk. Fan motors use to be a rather common issue. I think it was about 400 or 500 bucks to have MB fix. I didnt know what it was when it was under warranty. If its the motor it will get worse slowly.
Thread Starter
Newbie
Joined: Jan 2010
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c 350
Thanks for the response. This has been going on since I got the car but I can not get it to misbehave on request. Dealer never hears it. Irritating. Thought for a while it might be leaves in the blower, doesn't explain the ping pong L to R effect. tried changing the air flow direction or selecting the defrost. No joy. one day I'll be driving by the dealer at the very instant this 'squirrel in the attic ' is scratching the a/c system. Which is just slightly better odds, I think, than hitting Lotto. Was hopping this was not a rare occurrence. Thank you again.
Junior Member
Joined: Feb 2018
Posts: 46
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2018 C43 AMG
I've noticed some similar scratchy/rattly sounds that seem like they're coming from inside the dash over on the passenger side. I initially thought it was the glovebox or something inside it, but I've ruled that out now. I've also noticed it mostly on colder days, usually within the first 10 minutes or so of the car running, but changing settings on the climate control or turning it off doesn't seem to affect it. If you find out what it is be sure to post here.
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MBWorld Fanatic!
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From: Greater Cleveland area
2019 Dune Silver Metallic E-450 Mercedes Cabriolet NEW Mercedes 2020 GLC300 graphite gray SUV
Sounds like the doors opening and closing on the AC/heater unit. Best bet is to try and capture it by phone if possible.
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From: Schonaich, Germany
19 C43 Coupe, XC 60
Senior Member
Joined: Mar 2018
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From: Central Florida
'15 C400 and '15 ML350
Not to add more confusion to this but could be hearing high pressure fuel pump if its at a specific RPM (1700ish?) as there have been a few complaints on that. Also on the waste-gate rattling at idle and low RPM. I think i have this and it does sound like crickets in a box or marbles chattering around. Not sure there is a fix for it and i think its only the one on the passenger side.
Thread Starter
Newbie
Joined: Jan 2010
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c 350
Thats a great idea. Feeling stupid not to have thought of it already. I’ll give it a shot. Betting they will still need to reproduce it themselves. Thanks
Newbie
Joined: Jun 2020
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From: Boise, Idaho
2016 E63s
