I have an 85 380SE that emits a very loud chirp or squeek from the right rear door area when traveling at speed and going around right hand turns. I've sprayed all the plastic body cladding in the door jamb area with silicone, as I know these can cause some noises.

Anyone experienced this?

Brian in Austin

On my W123 the front passenger door had a similar problem - it was due to a knackered (ripped) door seal.

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

To cure this you need to purchase some sticky felt and apply it to the bottom edges of the door panels where the hard plastic door panel "edge" meets the hard plastic door sill plates. There is also a spot on the front doors that can creak. Pretty much impossible to explain that location here on the forum. You can cure 99% of your problems by doing the felt on the door panel trick first.

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1984 300 SD 384,000 Miles

This is not the characteristic scruffy sound we all get with 126 cars from the plastic cladding rubbing on something in or around the door jamb. All that went away years ago with regular applications of silicone spray. This is a hard chirp that only occurs on right hand curves at road speed and only in the area of the right rear door,.....actually thought it was coming from the rear seat........( and it may be)

Im willing to try the felt thing, but, I would ask you if you tried a thorough dousing of silicone on all those edges before you tried the felt thing and I would also ask if you had a very loud and pronounced singular "CHIRP,CHIRP, CHIRP, CHIRP....................?

Sounds like something different. No idea what it could be... I went straight to felt, never tried the silicone so I can't comment on whether the felt reduces noise further. Are you sure the sound is coming from the interior?

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1984 300 SD 384,000 Miles

I tried both ;only the felt worked and still very much effective.
Rd

How much sticky felt are you folks talking about? Is it like 2 small squares/circles? Or does a bead of it need to be applied?

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daw_two
Germantown, TN

Links:
Sold last car --- 05/2012 1984 300D Light Ivory, Red interior
Cluster Needles Paint
New Old Stock (NOS) parts

Past:
3/2008 1986 300SDL "Coda"
04/2010 1965 190D(c) "Ben"
& many more

Yeah, might be different than the squeak of the lower door panel on the sill molding cover panel.
Not possibly a wheel bearing - ouch!
Might be the seat mounting where it snaps down; might pull it up and lube that.
I had good luck on the usual squeaking area by lifting the little rubber flap on the sill cover and applying silicon grease under that lip. Its a little vertical flap about 1/4 inch tall that contacts the bottom of the door panel when closed, it gets squashed up against the sill panel, and may itch against it, creating the squeak.

DG