Throttle Response
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Joined: Jul 2019
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CLS400 4Matic EC Tuned
Throttle Response
After driving this CLS400 for a few months, there have been about 3-4x when I press on the accelerator, and nothing happens for about 1-2 seconds. The very first time, I pressed on it a bit more and I accelerated way too fast (was just trying to get it to move). Is this what is known as turbo lag, and for those of you with this model, have you experienced this? Is this normal? Because there's no check engine light or nothing, service was done about 7000-9000KM ago.
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CLS400 4Matic EC Tuned
Okay so with more experience, I’ve noticed if I’m in sport and switch to eco, it’s more likely this will happen.
Last night I was in eco the entire time, and had to turn left (no traffic), and it took about 3-4 seconds AFTER I pressed on the accelerator, and pushed to half way down to get it to move.. This would’ve been super dangerous if there was traffic. Does anybody else experience a similar issue?
Last night I was in eco the entire time, and had to turn left (no traffic), and it took about 3-4 seconds AFTER I pressed on the accelerator, and pushed to half way down to get it to move.. This would’ve been super dangerous if there was traffic. Does anybody else experience a similar issue?
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2012 CLS550, 1994 Chevy K1500
CLS550 here. Throttle lag at times, probably in the 0.5 sec range; not as bad as what you describe. Worse in E mode. Better than my 2005 Audi was. That car made adapting to the lag second nature, I guess.
In warmer seasons, I’m always in S mode, and lag isn’t nearly as apparent. In winter, I tolerate it for safety reasons.
In warmer seasons, I’m always in S mode, and lag isn’t nearly as apparent. In winter, I tolerate it for safety reasons.
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Senior Member
Joined: Jul 2019
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CLS400 4Matic EC Tuned
CLS550 here. Throttle lag at times, probably in the 0.5 sec range; not as bad as what you describe. Worse in E mode. Better than my 2005 Audi was. That car made adapting to the lag second nature, I guess.
In warmer seasons, I’m always in S mode, and lag isn’t nearly as apparent. In winter, I tolerate it for safety reasons.
In warmer seasons, I’m always in S mode, and lag isn’t nearly as apparent. In winter, I tolerate it for safety reasons.
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Joined: Dec 2016
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2012 CLS550, 1994 Chevy K1500
The throttle lag you describe is definitely a safety issue. Its hard for the brain to de-commit from pulling out in an intersection in case of a delay in throttle response, especially if it’s inconsistent and/or extreme. I’d have it checked, but I don’t know if it’s fixable. Hopefully, one of the smart guys will chip in with a more definitive opinion.
On re-reading your first post, what you are describing is delay in response of the electronic throttle, not old-style “turbo lag”. I had a ‘91 Mitsubishi Eclipse GSX. That had turbo lag, as did pretty much all of that generation of turbo vehicles. Tromp on the gas and the little 4 cylinder would vainly attempt to accelerate. Then the turbos would spool up when it hit 1800-2000 rpm and....voom, you were flying. The initial, slower acceleration was without delay.
On re-reading your first post, what you are describing is delay in response of the electronic throttle, not old-style “turbo lag”. I had a ‘91 Mitsubishi Eclipse GSX. That had turbo lag, as did pretty much all of that generation of turbo vehicles. Tromp on the gas and the little 4 cylinder would vainly attempt to accelerate. Then the turbos would spool up when it hit 1800-2000 rpm and....voom, you were flying. The initial, slower acceleration was without delay.
Last edited by Stens; Dec 23, 2019 at 07:33 AM.
Thread Starter
Senior Member
Joined: Jul 2019
Posts: 443
Likes: 91
CLS400 4Matic EC Tuned
The throttle lag you describe is definitely a safety issue. Its hard for the brain to de-commit from pulling out in an intersection in case of a delay in throttle response, especially if it’s inconsistent and/or extreme. I’d have it checked, but I don’t know if it’s fixable. Hopefully, one of the smart guys will chip in with a more definitive opinion.
On re-reading your first post, what you are describing is delay in response of the electronic throttle, not old-style “turbo lag”. I had a ‘91 Mitsubishi Eclipse GSX. That had turbo lag, as did pretty much all of that generation of turbo vehicles. Tromp on the gas and the little 4 cylinder would vainly attempt to accelerate. Then the turbos would spool up when it hit 1800-2000 rpm and....voom, you were flying. The initial, slower acceleration was without delay. They’ve largely solved turbo lag.
On re-reading your first post, what you are describing is delay in response of the electronic throttle, not old-style “turbo lag”. I had a ‘91 Mitsubishi Eclipse GSX. That had turbo lag, as did pretty much all of that generation of turbo vehicles. Tromp on the gas and the little 4 cylinder would vainly attempt to accelerate. Then the turbos would spool up when it hit 1800-2000 rpm and....voom, you were flying. The initial, slower acceleration was without delay. They’ve largely solved turbo lag.
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2012 CLS 550 Launch Edition
Yes I have this in both Sport and Eco modes. I get the wheels spinning regularly because it doesn’t move so I apply more and more gas and all of a sudden it takes off like a rocket.
I’ve been meaning to take it to Mercedes to see if there’s something wrong with it because it certainly doesn’t feel right.
I’ve been meaning to take it to Mercedes to see if there’s something wrong with it because it certainly doesn’t feel right.
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S204 C250 CDI Sport
As before , there's a built in throttle plate delay determined by the ecu so that mature folk don't demolish too many walls in car parks !
You end up pressing the pedal too much , the throttle plate plays catch up the injectors squirt too much and it's off like a galloping horse .
You won't get anywhere with Mercedes .
For more accurate throttle plate control like that good old 1:1 cable that can save you fuel..
You end up pressing the pedal too much , the throttle plate plays catch up the injectors squirt too much and it's off like a galloping horse .
You won't get anywhere with Mercedes .
For more accurate throttle plate control like that good old 1:1 cable that can save you fuel..
