C219 CLS55 and CLS63, 2004-2010

CLS55 Power Loss

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Old Sep 20, 2021 | 07:02 PM
  #1  
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CLS55 AMG 2005
CLS55 Power Loss

Hi. Im new here and just 1 week into AMG ownership. A 2005 CLS55 AMG. Today, I gave the car full throttle in 2nd gear from 2K revs to 6K revs. I did this 3 times in the space of 2 minutes. On the 4th attempt, the car suffered a huge loss of power. It revved cleanly, no misfire, but with no where near as much pull as before. No warning lights, engine temp perfectly fine. And, also, the cabin filled up with the smell of petrol. After a couple of minutes of normal driving at 2K revs, I tried again, 2nd gear, full throttle, and this time it pulled properly. This is not the first time this has happened, it did it last week also. Same circumstances. I run it on 99 RON fuel, its been on a STAR diagnostic kit, nothing showed up. Why does the car lose so much power after a few bursts of full throttle up to the redline?? Help!!!
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Old Sep 21, 2021 | 10:18 AM
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2006 CLS55 AMG, 2005 SLK 350 AMG
Originally Posted by rossm
Hi. Im new here and just 1 week into AMG ownership. A 2005 CLS55 AMG. Today, I gave the car full throttle in 2nd gear from 2K revs to 6K revs. I did this 3 times in the space of 2 minutes. On the 4th attempt, the car suffered a huge loss of power. It revved cleanly, no misfire, but with no where near as much pull as before. No warning lights, engine temp perfectly fine. And, also, the cabin filled up with the smell of petrol. After a couple of minutes of normal driving at 2K revs, I tried again, 2nd gear, full throttle, and this time it pulled properly. This is not the first time this has happened, it did it last week also. Same circumstances. I run it on 99 RON fuel, its been on a STAR diagnostic kit, nothing showed up. Why does the car lose so much power after a few bursts of full throttle up to the redline?? Help!!!
Welcome to the forums. Since the CLS55 is based almost entirely on the W211 E Class platform, you will get a lot more eyeballs looking at your posts in that section of the site. Check it out here: https://mbworld.org/forums/w211-amg-81/ While I'm here, it sounds like too high intake air temps are temporarily reducing your power. Do a search for your engine on that subject and you will find lots of info. Good luck.
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Old Sep 21, 2021 | 05:59 PM
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This happened to me long time ago.... you will nee to upgrade your Intercooler pump.
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Old Sep 22, 2021 | 07:01 PM
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CLS55 AMG 2005
Originally Posted by CharlyE500
This happened to me long time ago.... you will nee to upgrade your Intercooler pump.
Thanks Charlie. Did this work for you?

Ive read other people who have had the same problem and the i/c change didnt work. Ive also read it could be a faulty external trmp sensor, so Ive ordered one of these and I will try this first before the more expensive i/c route.
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Old Sep 24, 2021 | 04:53 PM
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Yes, it worked for me. After few pulls still pull strong !
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Old Sep 24, 2021 | 04:57 PM
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Congrats and welcome Sorry about your loss.....get it? Your loss. I have no idea what to say other than welcome; good luck to you!
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Old Sep 24, 2021 | 05:26 PM
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CLS55 AMG 2005
Originally Posted by hyperion667
Congrats and welcome Sorry about your loss.....get it? Your loss. I have no idea what to say other than welcome; good luck to you!
Thanks mate. I appreciate everyones welcome. Being new to owning these old AMG cars, its great to be able to chat with experienced owners. Really great community on here. Owning this car will be a trial of love and expense. Im looking forward to seeing where it takes me.

For now, Im going to improve the paintwork, and then Im looking for more power. I'll keep you all updated
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Old Sep 24, 2021 | 05:38 PM
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Originally Posted by rossm
Thanks mate. I appreciate everyones welcome. Being new to owning these old AMG cars, its great to be able to chat with experienced owners. Really great community on here. Owning this car will be a trial of love and expense. Im looking forward to seeing where it takes me.

For now, Im going to improve the paintwork, and then Im looking for more power. I'll keep you all updated
Lets see some pics too when you get the chance! Love the CLS! Such a rare car too, I never see any in my neck of the woods. GL to ya mate!
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Old Sep 24, 2021 | 06:40 PM
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Old Sep 24, 2021 | 07:00 PM
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Looks great! nice color( I have Iridium too ), rad rear diffuser too What is the structure castle thing in the back there?
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Old Sep 24, 2021 | 07:16 PM
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Thanks mate. Yes good colour choice on your CLS63. It doesnt draw too much attention and then drops jaws when you open it up!

Is yours the 6.3 V8, or the 5.5 biturbo?

That structure is https://en.wikipedia.org/wiki/Chatsworth_House

Its the seat of the Duke of Devonshire. Some idiotic English aristocrat. Peer of the realm. The sort of person you really wouldn't want to have lunch with!!
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Old Sep 24, 2021 | 08:47 PM
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Originally Posted by rossm
Thanks mate. Yes good colour choice on your CLS63. It doesnt draw too much attention and then drops jaws when you open it up!

Is yours the 6.3 V8, or the 5.5 biturbo?

That structure is https://en.wikipedia.org/wiki/Chatsworth_House

Its the seat of the Duke of Devonshire. Some idiotic English aristocrat. Peer of the realm. The sort of person you really wouldn't want to have lunch with!!
Or more like the sort of chap that wouldn't want to have lunch with ME haha.
You're spot on with the description: it does drop jaws when you open it up. It does turn a lot of heads too I guess because you don't see them everyday, that and my shiny
penny wheels It is a 6.3 V8 TT. I also have removed all badges for the clean look as is yours
And thank you for the Chadsworth link
Cheers!
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Old Sep 29, 2021 | 03:53 PM
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Nice pix ! I have exact the same Silver except with CF front lip instead of rear diffuser.


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