C219 CLS55 and CLS63, 2004-2010

M113k power loss problem

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Old Mar 23, 2026 | 03:01 PM
  #1  
NCOWOO1's Avatar
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Cls55 renntech r2
M113k power loss problem

I recently purchased a cls55 with a renntech r2 kit. From a stop wot it accelerates normally and quickly, but when I stop that acceleration, and try to accelerate again at whatever speed I'm at, it refuses to make any power, slower than my 05 Camry, once I come to a full stop again, and accelerate from a stop it's fine again but the same problem happens once up to speed and trying to accelerate again, no check engine lights, only fault is "service brake system"

Full open throttle form a stop (10 mph):
https://youtube.com/shorts/-PRN5u3rm3Y?si=xcKXo4KYcCG2aKAj

Full open throttle at speed:
https://youtube.com/shorts/gIdv85gO8Bg?si=zgtDwa5w4sZPTy5v

Same but I downshift to second( this was directly after I accelerated from a stop and made normal power:
https://youtube.com/shorts/ge72g0Jrnqw?si=ObccPuvS1IYUSZbz
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Old Apr 18, 2026 | 04:50 PM
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Fanto's Avatar
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CLS55
Hi,

I believe I had the same issue, and it was the intercooler pump which was dead. If I remember well, they are known to fail after a while. You can replace it with the "upgraded" OEM version.

Hope this helped!
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