CD player issues?
The second issue is a lot more annoying and also seemed to be related to the in-dash CD, but now I'm not so sure. What happens is that sometimes when I open the door this vibrating and almost grinding noise starts coming from the dash. It almost sounds like the in-dash is struggling to load and spin up a CD. The sound starts before I even put the key in the ignition and lasts several seconds after the car is started. It can also occur without a CD in the in-dash, and replacing the in-dash CD player made no difference. So I'm sure this is sounding like it's just the SBC system. However I can't imagine this is normal, because it happens maybe 1 out of 4 times. Plus the sound is so loud when it happens, that it just shouldn't be typical.
Any insights would be greatly appreciated. My E has the Harmon Kardon without nav or phone.
The buzzing noise that you sometimes hear when you open the door is, as you surmise, the SBC pump. It has nothing to do with the CD player. It's loud enough to be startling if you don't expect it, but is entirely normal. The loud SBC pump is right up there as one of the top "WTF??" surprises of the W211, along with the lack of a dipstick, the inability to select radio presets from the steering wheel and the unearthly roar of the auxiliary fan when the A/C first kicks in on a very hot day.
Good luck and enjoy your ride.
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See this thread...
https://mbworld.org/forums/e-class-w211/115849-odd-noise.html
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With the SBC sometimes when I unlock the doors there is a loud rumbling noise and other times its a soft quieter rumble. Its annoying, when you pay upwards of 65 grand for a car and there is a loud noise coming from it.
What annoys me the most is the D*mn brake squeals as slow speeds.
, they are replacing the whole center command unit for me.
, they are replacing the whole center command unit for me.
They did all the updates, including ones you mentioned, last time I went in for service.
Thanks for the heads up



