Hi
I just chipped my 05 W211 E220 CDi Estate and I thought I would share the experience. I used Simon Coe of www.ccctech.co.uk. 275 GBP all in seemed like good value.
Simon first removed the ECU and then took it apart (!). Using a metal rig, he read the EPROM file and emailed it to Austria. Within an hour or so, a new EPROM fuel mapping file was returned and Simon uploaded it to the ECU.
Fitting back into the engine bay was simple and the car started as usual.
Now the E220 Estate is a big old barge which is why I bought it (kids and all) and I had to get a small engine due to tax reasons (well, i didnt have to, but it made sense).
Simon reckons I get about another 25 bhp and a whole bunch of extra torque without damaging the economy. All I can say is that so far all this seems to be true. There is more oompfh in the mid range and the car is much quicker to pick up.
On the downside, maybe the engines a bit noiser at idle (? - hard to tell, it was a cold morning and the 4 pot was never the smoothest) and who knows what the long term relaibility holds (I'm taking the risk). I have informed my insurance people who only added an extra 50 quid to my insurance.
So, early days yet, but he seems to have done everything he said he would and without having to fit nasty aftermarket wires to the fuel injectors.
I'll let you guys know how I get on.
I just chipped my 05 W211 E220 CDi Estate and I thought I would share the experience. I used Simon Coe of www.ccctech.co.uk. 275 GBP all in seemed like good value.
Simon first removed the ECU and then took it apart (!). Using a metal rig, he read the EPROM file and emailed it to Austria. Within an hour or so, a new EPROM fuel mapping file was returned and Simon uploaded it to the ECU.
Fitting back into the engine bay was simple and the car started as usual.
Now the E220 Estate is a big old barge which is why I bought it (kids and all) and I had to get a small engine due to tax reasons (well, i didnt have to, but it made sense).
Simon reckons I get about another 25 bhp and a whole bunch of extra torque without damaging the economy. All I can say is that so far all this seems to be true. There is more oompfh in the mid range and the car is much quicker to pick up.
On the downside, maybe the engines a bit noiser at idle (? - hard to tell, it was a cold morning and the 4 pot was never the smoothest) and who knows what the long term relaibility holds (I'm taking the risk). I have informed my insurance people who only added an extra 50 quid to my insurance.
So, early days yet, but he seems to have done everything he said he would and without having to fit nasty aftermarket wires to the fuel injectors.
I'll let you guys know how I get on.
