M275 V12 Bi-Turbo Platform Technical discussion relating to models sharing the M275 V12 Bi-Turbo (V12 TT). Including SL600, SL65 AMG, CL600, CL65 AMG, S600, S65 AMG.
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clunking under hard acceleration

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Old Dec 22, 2019 | 01:09 PM
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2007sclass's Avatar
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From: North Florida
S550
clunking under hard acceleration

when I mash the gas from a dig the power-train seems to clunk a lot. I figured it was the trans mount and replaced. to my surprise the mount was not broken or torn but I replaced it anyway only to find the clunk still exists. Other ideas?
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Old Dec 28, 2019 | 08:21 AM
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pillowshot's Avatar
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2007 CL600
Originally Posted by 2007sclass
when I mash the gas from a dig the power-train seems to clunk a lot. I figured it was the trans mount and replaced. to my surprise the mount was not broken or torn but I replaced it anyway only to find the clunk still exists. Other ideas?
Rear subframe bushes?

Propshaft couplings?

Engine mounts?
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Old Jan 17, 2021 | 04:19 PM
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Frank THE TANK!'s Avatar
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From: Campbell, Ca.
2003 CL 600 V-12 BI-TURBO
Same problem here. Replaced motor mounts. One was broken. One was collapsed. Problem solved! $2500.00
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