E-Class (W212) 2010 - 2016: E 350, E 550
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E250 CGI Throttle Lag

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Old Oct 7, 2019 | 12:57 AM
  #1  
Michel.S's Avatar
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w124 E230 1987, w212 E250 CGI 2011
E250 CGI Throttle Lag

Hello Everyone, I have a w212 E250 CGI with the 5 Speeds transmission and 100,000 KM, the car is acting sometimes like the below:
when I want to accelerate I push the throttle but it doesn't,t respond for a 2 sec maybe, then it launches itself like crazy(can be dangerous in some circumstances) it is like the transmission isn't downshifting at the correct moment. there is no CEL. I tried the TCU reset procedure but it improved things for a short time and then it came again.
it is very random and doesn't happen all the time. I can drive the car for days smoothly without any lag and then it reappears from nowhere.

Your help is really appreciated as in my country the repair procedure is mostly done by throwing parts without any correct diagnostic.

Thank you.
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Old Oct 7, 2019 | 05:37 PM
  #2  
mellonc's Avatar
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E250 Diesel
Isn't that the turbo lag you are describing?
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Old Oct 8, 2019 | 12:55 AM
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Michel.S's Avatar
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w124 E230 1987, w212 E250 CGI 2011
I don't think it is a turbo Lag. it happens also when the car is starting from a stoplight. does a turbo lag manifest itself like this in a Petrol Engine??
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Old Oct 8, 2019 | 02:47 AM
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Gazwould's Avatar
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S204 C250 CDI Sport
The infamous Merc and others drive by wire built in throttle delay and slow opening of throttle plate .



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Old Oct 9, 2019 | 07:39 AM
  #5  
Michel.S's Avatar
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w124 E230 1987, w212 E250 CGI 2011
if this is the case why does the car sometimes act normal without any delay and other times it has a lot of delay. is there any software update for this issue maybe?
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Old Oct 9, 2019 | 11:40 AM
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From: Austin, TX
2013 SL550 BiTurbo
intermittent boost leak?
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