Engine noise, odd
Thread Starter
Senior Member
Joined: Jun 2002
Posts: 314
Likes: 0
From: Oakville, Ont., Canada
2009 ML320 CDi Bluetec
Engine noise, odd
Quite often my E320 engine, for an hour or two after I turn off the car, produces a sqeeky whistling sound. Perhaps, I theorise, air escaping from a contracting area or something like that. It was doing it again this evening (heard clearly in the garage).
Anyone ever hear anything similar?
This is not, by the way, a problem. In no way affects the engine. Just curious.
Anyone ever hear anything similar?
This is not, by the way, a problem. In no way affects the engine. Just curious.
Super Member
Joined: Oct 2002
Posts: 926
Likes: 0
From: VA
03 E320, sport package, moon roof, sound upgrade, brilliant silver, charcoal leather, heated seats..
yes, I have been hearing this too so I cut back on the beans......
no, really it only seems to happen after driving around for more than an hour...don't know why.
no, really it only seems to happen after driving around for more than an hour...don't know why.
Junior Member
Joined: Dec 2002
Posts: 23
Likes: 0
From: Richmond, VA
06 SL 500
I heard this last night for the first time when I went out to the garage after the car had been there for an hour or so. This was the first day back from 20 days in service to have module replaced. Had the car for about a month and only been able to use it for 10 days.
Even with that I think its great!
Sure would like to know what that whistle is???
Even with that I think its great!
Sure would like to know what that whistle is???
Senior Member
Joined: Oct 2002
Posts: 296
Likes: 0
From: New York
2003 E500
Well, given that there's a pump to crank up the Sensotronic brakes that starts when you open the door, perhaps there is a timer after shutdown that bleeds off whatever pressure it is that SBC builds up with that pump.
Member
Joined: Sep 2002
Posts: 137
Likes: 0
There are other possibilities - Could be the radiator fan which can be on even when the car is shut off or it could be extracting engine heat to keep the cabin warn (there is a switch in the cabin to do this but I cannot remember which since I have not used this function yet).
Trending Topics
Member
Joined: Sep 2002
Posts: 137
Likes: 0
There are other possibilities - Could be the radiator fan which can be on even when the car is shut off or it could be extracting engine heat to keep the cabin warn (there is a switch in the cabin to do this but I cannot remember which since I have not used this function yet).
MB World Stories
The Best of Mercedes & AMG
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Mercedes Teases Updated EQS With Steer-By-Wire and a Yoke
Verdad Gallardo
