300 SEL Suspension Noises

1979-1991 280SE, 300SE, 300SEL, 380SE, 380SEL, 380SEC, 420SE, 420SEL, 420SEC, 500SE, 500SEL, 500SEC, 560SEL, 560SEC
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jas-300-sel
C Class
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Joined: Tue 25 Aug, 2015 11:12 pm
Model you own: w126

300 SEL Suspension Noises

Post by jas-300-sel » Sat 20 Jan, 2018 2:33 pm

Hi guys, recently my front suspension started making little clicking and knocking sounds when driving on smooth surfaces like a car park or smooth road and after the car warmed up they went away. My mechanic said it was the front shocks when the fluid settles in old ones it leaves a gap which causes the noise but as they warm up the fluid expands and sound goes away. So I ordered new Bilstein OEM front shocks and had them fitted yesterday. I jumped in the car this morning and the little knocking & clunking noises are still there till the car warmed up on the road, which was about 15 mins.

MY mechanic said the bump stops will need replacing soon as they've collapsed a fair bit. Can anyone give me some ideas as to what this noise could be and why it goes away once the car has warmed up? Do new shocks take time to bed in or anything to get fluids moving?

Cheers

Jas.
'89 300 SEL

CraigB
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Re: 300 SEL Suspension Noises

Post by CraigB » Sat 20 Jan, 2018 5:50 pm

Given that you are hearing the noise on smooth surfaces with little movement, I wouldn't be thinking shocks but I think its something that is binding up and affected by the small movement - my guess ball joint lower control arm, maybe upper. I would check and see if the boots on any of them are broken that might be a hint. I'm trying to remember what my wheel alignment place does, but they basically lever or jack the suspension and i guess feel the different joints with movement and can tell which is making noise. Maybe you could try to spray some Inox or something in there and see if it makes a difference - not a long term solution but if it goes temporarily you know where the problem was. Years ago my Alfa had a worn lower ball joint, replaced with a cheap one, had the noise you describe, tried to lube it more, replaced with a good quality one and was fine ever since. In the good old days it would have had a grease nipple and you could pump grease through it!
Craig Baulderstone
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jas-300-sel
C Class
Posts: 44
Joined: Tue 25 Aug, 2015 11:12 pm
Model you own: w126

Re: 300 SEL Suspension Noises

Post by jas-300-sel » Sat 20 Jan, 2018 11:19 pm

Thanks Craig.
'89 300 SEL

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