SL/R230: Engine Noise
MBworld Guru
Joined: Dec 2009
Posts: 10,782
Likes: 1,011
NO LONGER ACTIVE
Did it just recently get very hot where you live? I've always found that MBZ engines just don't like extremely hot and humid weather. My SL550 idles jsut a bit less smoothly in the summer, as did my CLK550's. I had an ML320 that absolutely hated hot/humid weather - it would sometime even die at idle. Neither I not the dealer ever found out what caused it as everything was "normal and in spec" until ti would die.
Junior Member
Joined: Feb 2016
Posts: 23
Likes: 5
2004 SL500
You can also do the old broomstick test and see if it's any of the accessories that are grinding or part of the engine itself. I know on my W210 the tensioner pulley was a bit of a weak point, but that usually squeaked rather than the chugging sound you're describing.
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Member
Joined: Mar 2016
Posts: 80
Likes: 12
1992 400E, 1997 SL500, 2007 SL55 AMG, 2016 E400
Have you had the noise all along? If so, it may be normal supercharger noise. They're quite noisy. I took my car to a MB-only indy when I first got it who told me it's normal. ** Sorry, I just assumed your car is an AMG and I just noticed it doesn't say which model you have.** Never mind.
Last edited by Noir230; Jun 20, 2018 at 03:10 PM. Reason: Addition.
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Newbie
Joined: Sep 2007
Posts: 6
Likes: 0
SL500 2006
My M113 engine has a valve ticking noise which can only be heard at certain RPMs. According to other threads, it is old oil/carbon deposits on the valve/valve seats. Some say changing the oil to Mobil 1 fixes it, but in my case there was no difference.
If this is true, how do we get rid of those deposits? I recently did a CataClean, which worked and fixed my check engine light by cleaning the cats from soot deposits. Not sure if it is supposed to fix valve tick too but anyhow, it didnt, at least not in my case.
If this is true, how do we get rid of those deposits? I recently did a CataClean, which worked and fixed my check engine light by cleaning the cats from soot deposits. Not sure if it is supposed to fix valve tick too but anyhow, it didnt, at least not in my case.
