MBWill
Member
- Joined
- May 5, 2017
- Messages
- 23
- Reaction score
- 3
- Age
- 28
- Location
- near Westerham, United Kingdom
- Your Mercedes
- 2014 2.1 (168bhp) C220 CDI SE EXECUTIVE
So a few weeks ago I began noticing my car would struggle to accelerate, when going from say 20 to 30, it would take a good 10 seconds or more to increase speed by 10mph.
Even in sports mode, it's exactly the same.
This issue was intermittent, recently it had become recurring, and the other day happened just before I was about to drive up a steep hill, I had my foot flat to the floor doing 70 on approach to the hill (it's a hill on a fast road), foot flat down all the way to the top, and at the top I was only doing 35.
Another issue is it feels as if the gears are holding the car back, it will change, try to increase speed, but it won't change gear so you can feel the car being restrained, almost as if it's on a speed limiter - which it isn't.
After thinking it may be the EGR, MAF or the turbo not working I took it to my local garage who connected it to their OBD scanner, the only error that came up was something about DPF regeneration not taking place, the engine management light now comes on every so often, but far more often than it used to.
Yesterday after visiting my mechanic I went for a drive to try and perform a DPF Regen burn, initially for the first 5 minutes the car performed as it should, with no issues, then I had to slow down due to a slow moving vehicle in front, the minute I applied the brake the engine warning light came on and the car went back into limp mode where it really struggles to accelerate and loses power on slight gradients.
I took the car for a drive, doing between 30 and 60 miles an hour, with it revving between 2,500 and 3,000 RPM almost the entire time, I probably spent over an hour doing this, my question is this.
The exhaust, although hot, did not appear super hot, like it's supposed to (apparently reaching around 600 degrees when performing a burn), there was no smell of ash and no excessive smoke.
Is this the correct method for 'forcing' a regen? Is there any way to know it's taking place, other than hooking it up to an OBD with a live data feed capability?
Additionally, how will I know the process is "Complete" so to speak, and that a sufficient amount has been removed?
I was told that should I continue to drive the vehicle for short journeys the DPF will become fully blocked and the vehicle will have serious power issues, as it is at the minute trying to overtake lorries on dual carriageways is a struggle, taking a good 20 seconds to pass them on full throttle.
I have bought some DPF cleaner, so will be using that as well as repeating the process again tonight.
The car does seem to accelerate from 0-40 better, however once you go past 40 it then becomes slower to accelerate, the whole time the EML (Engine Management Light) is on, steady amber.
Thanks in advance.
Even in sports mode, it's exactly the same.
This issue was intermittent, recently it had become recurring, and the other day happened just before I was about to drive up a steep hill, I had my foot flat to the floor doing 70 on approach to the hill (it's a hill on a fast road), foot flat down all the way to the top, and at the top I was only doing 35.
Another issue is it feels as if the gears are holding the car back, it will change, try to increase speed, but it won't change gear so you can feel the car being restrained, almost as if it's on a speed limiter - which it isn't.
After thinking it may be the EGR, MAF or the turbo not working I took it to my local garage who connected it to their OBD scanner, the only error that came up was something about DPF regeneration not taking place, the engine management light now comes on every so often, but far more often than it used to.
Yesterday after visiting my mechanic I went for a drive to try and perform a DPF Regen burn, initially for the first 5 minutes the car performed as it should, with no issues, then I had to slow down due to a slow moving vehicle in front, the minute I applied the brake the engine warning light came on and the car went back into limp mode where it really struggles to accelerate and loses power on slight gradients.
I took the car for a drive, doing between 30 and 60 miles an hour, with it revving between 2,500 and 3,000 RPM almost the entire time, I probably spent over an hour doing this, my question is this.
The exhaust, although hot, did not appear super hot, like it's supposed to (apparently reaching around 600 degrees when performing a burn), there was no smell of ash and no excessive smoke.
Is this the correct method for 'forcing' a regen? Is there any way to know it's taking place, other than hooking it up to an OBD with a live data feed capability?
Additionally, how will I know the process is "Complete" so to speak, and that a sufficient amount has been removed?
I was told that should I continue to drive the vehicle for short journeys the DPF will become fully blocked and the vehicle will have serious power issues, as it is at the minute trying to overtake lorries on dual carriageways is a struggle, taking a good 20 seconds to pass them on full throttle.
I have bought some DPF cleaner, so will be using that as well as repeating the process again tonight.
The car does seem to accelerate from 0-40 better, however once you go past 40 it then becomes slower to accelerate, the whole time the EML (Engine Management Light) is on, steady amber.
Thanks in advance.