felloffajetski27
New Member
Hello all
New poster here but have been lurking for a long time,
My C220 is a well maintained car from new, I am 2nd owner. Serviced often by myself. Only issues I have had have been DPF related , I have had to change the differential pressure switch once. I have also had a timing chain and tensioner replaced. Milaege now on 196k
Car happily achieved decent MPG in the past. A while back though the car went in for an airbag recall and I asked them not to do the emissions software update, but predictably they did it anyhow, and since then this is where I have noticed a large decrease in fuel economy.
I am wondering though is it just down to this software update, or do I have another issue. I have icarsoft mb2.0 diagnostics so have been looking for clues and the only issue i see is the Y85 EGR cooler bypass switchover valve fault 53336/6058. The care drives fine, plenty of power, no other faults. I have looked at diagnostics on load and full acceleration , car pulls well no faults, boost pressure around 2.7bar etc
I have noticed DPf seems to fill to 100% fairly quickly , say 1% every mile or so which seems high.....could this DPF regen looping often be causing worse economy? I uderstand it uses fuel to regen so this is plausible.
Could the fact the DPF is on 196k and presumably the same from new be an issue?? Ive tried running injector fuel additive etc without much success.
As I say car performs normally, temperature gets up quickly and sits at 90 as it should, no leaks, car drives beautifully apart from the awful MPG - im getting circa 400 to 450 miles to a full tank. Calculated properly fuel consumption around 37mpg over a full tank. Tyre pressures fine, no dragging brakes etc.
I wonder if the Y85 is causing issues, or is it just the fact I have had the emission update and that is the soul cause??
Please help!
Thanks
Paul
New poster here but have been lurking for a long time,
My C220 is a well maintained car from new, I am 2nd owner. Serviced often by myself. Only issues I have had have been DPF related , I have had to change the differential pressure switch once. I have also had a timing chain and tensioner replaced. Milaege now on 196k
Car happily achieved decent MPG in the past. A while back though the car went in for an airbag recall and I asked them not to do the emissions software update, but predictably they did it anyhow, and since then this is where I have noticed a large decrease in fuel economy.
I am wondering though is it just down to this software update, or do I have another issue. I have icarsoft mb2.0 diagnostics so have been looking for clues and the only issue i see is the Y85 EGR cooler bypass switchover valve fault 53336/6058. The care drives fine, plenty of power, no other faults. I have looked at diagnostics on load and full acceleration , car pulls well no faults, boost pressure around 2.7bar etc
I have noticed DPf seems to fill to 100% fairly quickly , say 1% every mile or so which seems high.....could this DPF regen looping often be causing worse economy? I uderstand it uses fuel to regen so this is plausible.
Could the fact the DPF is on 196k and presumably the same from new be an issue?? Ive tried running injector fuel additive etc without much success.
As I say car performs normally, temperature gets up quickly and sits at 90 as it should, no leaks, car drives beautifully apart from the awful MPG - im getting circa 400 to 450 miles to a full tank. Calculated properly fuel consumption around 37mpg over a full tank. Tyre pressures fine, no dragging brakes etc.
I wonder if the Y85 is causing issues, or is it just the fact I have had the emission update and that is the soul cause??
Please help!
Thanks
Paul