Acceleration problems of the C250 CGI
Newbie
Joined: Dec 2011
Posts: 2
Likes: 0
2010 C 250 cgi
Battery Problems C250 Cgi
C250 CGI
We purchased a C250 CGI last December and have had nothing but problems with it, Apart from the sluggish pickup !!! under statement the gearbox has now been replaced ,the front struts replaced ? the power steering just stoped one day ,tow in to dealer and repaired, now the battery keeps going flat !!! three time in on e week >? and the road side assist man said there was no fault with battery or charging ? must be the car management system.
A true lemon car if I have ever seen one ! don't buy one
We purchased a C250 CGI last December and have had nothing but problems with it, Apart from the sluggish pickup !!! under statement the gearbox has now been replaced ,the front struts replaced ? the power steering just stoped one day ,tow in to dealer and repaired, now the battery keeps going flat !!! three time in on e week >? and the road side assist man said there was no fault with battery or charging ? must be the car management system.
A true lemon car if I have ever seen one ! don't buy one
and also turbo lag but I think its just the aweful transmission. If you drive it in manuel mode it goes okay.
Newbie
Joined: Oct 2012
Posts: 2
Likes: 0
MB C250 Throttle Response
I'm in a unique position in that I've had two 2012 MB C250s over the past several months. Also, many of my coworkers drive the same car and we've all complained about the throttle lag that is described in this thread.
Both the C250s that I've had were identically equipped but the throttle response between the two couldn't be more different. The second one doesn't have any lag what so ever and is such a pleasure to drive.
It appears that MB has fixed the issue late in the 2012 model year.
Both the C250s that I've had were identically equipped but the throttle response between the two couldn't be more different. The second one doesn't have any lag what so ever and is such a pleasure to drive.
It appears that MB has fixed the issue late in the 2012 model year.
Newbie
Joined: Oct 2012
Posts: 2
Likes: 0
I've been driving my late year production 2012 C250 for two months and it has been an absolute joy.
Several coworkers of mine have recently replaced their 2012 C250s with 2013s and all have been impressed with the improved drivability.
Hopefully, MB will offer an update to owners of earlier C250s through their local dealerships.
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MBWorld Fanatic!
Joined: Apr 2008
Posts: 1,167
Likes: 11
From: The Netherlands - ROTTERDAM
W205 C400
Thanks for the info, i have an early FL 2012 C180CGI so i will ask my dealer about "flash".
Had an C180K 5 speed auto trans and my dealer also flashed this, was a big difference.
Had an C180K 5 speed auto trans and my dealer also flashed this, was a big difference.
MBWorld Fanatic!
Joined: Sep 2008
Posts: 1,331
Likes: 9
From: Delaware
2004 Mazda6, 1993 RX7
OP, hope a flash is available. As otherr's said, the sprint booster will reduce built in lag for normal take offs.
The flooring it => redline from slow speed is someting YOU have to adjust for. The TCU is not perfect, and MB loves to do short shiftng to put you at slow speed and low rpm related with too high gear.
You might do a slow floor, of drive in S mode.
.
The flooring it => redline from slow speed is someting YOU have to adjust for. The TCU is not perfect, and MB loves to do short shiftng to put you at slow speed and low rpm related with too high gear.
You might do a slow floor, of drive in S mode.
.
MBWorld Fanatic!
Joined: Sep 2008
Posts: 1,331
Likes: 9
From: Delaware
2004 Mazda6, 1993 RX7
Junior Member
Joined: Feb 2013
Posts: 36
Likes: 1
From: Perth Australia
2012 C250
OP, hope a flash is available. As otherr's said, the sprint booster will reduce built in lag for normal take offs.
The flooring it => redline from slow speed is someting YOU have to adjust for. The TCU is not perfect, and MB loves to do short shiftng to put you at slow speed and low rpm related with too high gear.
You might do a slow floor, of drive in S mode.
.
The flooring it => redline from slow speed is someting YOU have to adjust for. The TCU is not perfect, and MB loves to do short shiftng to put you at slow speed and low rpm related with too high gear.
You might do a slow floor, of drive in S mode.
.
Can they remap the TCU to not change up so readily?
Newbie
Joined: Jul 2017
Posts: 1
Likes: 0
Mercedes C250 CGI Model 2010
HI ,
I am facing the same problem (second one) with my C250 CGI 2010 model. My service provider told me to replace Catalytic Converters , as its a common problem with CGI system.
However , i suggest before you change it, try cleaning it with special chemical. and also replace your air filter , if you haven't done it for a while.
Cheers
I am facing the same problem (second one) with my C250 CGI 2010 model. My service provider told me to replace Catalytic Converters , as its a common problem with CGI system.
However , i suggest before you change it, try cleaning it with special chemical. and also replace your air filter , if you haven't done it for a while.
Cheers
I have my c250 cgi since the end of last year. I am suffering two problems during acceleration.
The first one is a delay of almost 1 second after depressing the accelerator suddenly. I visited the service center and they said this is normal, and a friend of mine who has a one year older c280 says he suffers the same and that he wants to sell the car because of this. Is this normal? is there something that can be done to avoid it?
The second one is if you depress the accelerator down to the end while the car is moving slowly the RPM exceeds the maximum and the engine stalls, and you have to remove you foot so that transmission takes place. This is more dangerous than the first problem and it is really frustrating.
Anyone who has a solution please shout out.
The first one is a delay of almost 1 second after depressing the accelerator suddenly. I visited the service center and they said this is normal, and a friend of mine who has a one year older c280 says he suffers the same and that he wants to sell the car because of this. Is this normal? is there something that can be done to avoid it?
The second one is if you depress the accelerator down to the end while the car is moving slowly the RPM exceeds the maximum and the engine stalls, and you have to remove you foot so that transmission takes place. This is more dangerous than the first problem and it is really frustrating.
Anyone who has a solution please shout out.
Junior Member
Joined: Aug 2022
Posts: 22
Likes: 4
From: Dar es Salaam, Tanzania
Blue efficiency C250 CGI
Hi everyone, (C250 CGI 2010)
I havent been able to find a correct thread to post my issue, but I think this one is more relatable.
So I have been having a lot of issues with my C250 CGI 2010, but the current issue has been a headache, The car had a fuel pump problem low pressure with the faulty code P254000, P254009, and P253909 (xentry) but I have been able to drive the car flawless with no issue, in fact I have driven the car for more than 600km, anyway we tried several pump eventually we found one and two faulty code went away, Currently I only have P253909, at this point I drove it for a day, then the acceleration problems started, When I put the car in parking "P" the rpm would flow normal from 0 to 6000rpm with no issue at all and no idle problem or any misfire or rpm shaking, but when I put it D or R the engine rpm never pass 1200rpm If I hold it for too long the rpm would jump to 4000rpm the car has no other faulty code, what we have done so far, we have swapped a working throttle, swapped and reprogrammed engine ECU, I have changed transmission control and transmission oil change still the car wouldn't accelerate, I have also changed Fuel Control Module, and high pressure fuel pump, But still rpm would not rev pas 1500rpm in drive, any suggestion in what to do next,
I havent been able to find a correct thread to post my issue, but I think this one is more relatable.
So I have been having a lot of issues with my C250 CGI 2010, but the current issue has been a headache, The car had a fuel pump problem low pressure with the faulty code P254000, P254009, and P253909 (xentry) but I have been able to drive the car flawless with no issue, in fact I have driven the car for more than 600km, anyway we tried several pump eventually we found one and two faulty code went away, Currently I only have P253909, at this point I drove it for a day, then the acceleration problems started, When I put the car in parking "P" the rpm would flow normal from 0 to 6000rpm with no issue at all and no idle problem or any misfire or rpm shaking, but when I put it D or R the engine rpm never pass 1200rpm If I hold it for too long the rpm would jump to 4000rpm the car has no other faulty code, what we have done so far, we have swapped a working throttle, swapped and reprogrammed engine ECU, I have changed transmission control and transmission oil change still the car wouldn't accelerate, I have also changed Fuel Control Module, and high pressure fuel pump, But still rpm would not rev pas 1500rpm in drive, any suggestion in what to do next,
Joined: Nov 2016
Posts: 7,847
Likes: 3,496
From: Maryland
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Understand that when a car is in P or N, there is effectively no load on the engine when you rev it. And with a turbo car, you will have very limited boost (if any) with no load. The DTC indicates a fault with the Low Pressure Fuel Sensor, which may impact fuel delivery to the HPFP. When in gear and under load, you're limited to 1200-1500 rpm, which may be a restriction to protect the engine. Too little fuel while under boost can be destructive to the engine. But I would think you would have other codes. Is the P2539 shown as Current, Stored, or Permanent?
You have done a lot of work on fixing this problem, but when you replaced the HPFP, did you also replace the low pressure sensor? Also, I'm confuse about replacing the engine ECU. Was this all done by Mercedes or an independent shop?
You have done a lot of work on fixing this problem, but when you replaced the HPFP, did you also replace the low pressure sensor? Also, I'm confuse about replacing the engine ECU. Was this all done by Mercedes or an independent shop?
Junior Member
Joined: Aug 2022
Posts: 22
Likes: 4
From: Dar es Salaam, Tanzania
Blue efficiency C250 CGI
Understand that when a car is in P or N, there is effectively no load on the engine when you rev it. And with a turbo car, you will have very limited boost (if any) with no load. The DTC indicates a fault with the Low Pressure Fuel Sensor, which may impact fuel delivery to the HPFP. When in gear and under load, you're limited to 1200-1500 rpm, which may be a restriction to protect the engine. Too little fuel while under boost can be destructive to the engine. But I would think you would have other codes. Is the P2539 shown as Current, Stored, or Permanent?
You have done a lot of work on fixing this problem, but when you replaced the HPFP, did you also replace the low pressure sensor? Also, I'm confuse about replacing the engine ECU. Was this all done by Mercedes or an independent shop?
You have done a lot of work on fixing this problem, but when you replaced the HPFP, did you also replace the low pressure sensor? Also, I'm confuse about replacing the engine ECU. Was this all done by Mercedes or an independent shop?
Joined: Nov 2016
Posts: 7,847
Likes: 3,496
From: Maryland
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Junior Member
Joined: Aug 2022
Posts: 22
Likes: 4
From: Dar es Salaam, Tanzania
Blue efficiency C250 CGI
