Date registered: Jun 2014
Vehicle: 2005 E320 CDI
Location: East Central Florida
Mentioned: 0 Post(s)
Quoted: 14 Post(s)
E320 CDI - Green Diesel Engineering tune
Well, I finally put my GDE Eco tune in last evening. The process was fairly simple. After I paid for the tune, GDC shipped me a flash loader along with a USB cable and a OBD-II cable with a 25-pin connector that connected in to the flash loader. Using the provided instruction sheet, I downloaded the control program that allowed a computer to talk to the flash loader, along with the USB drivers to interface it to the PC. Install the software & drivers on the PC, then connect the flash loader to the PC with the USB cable. Run the control panel program for the flash loader on the PC, tell the flash loader what car you have and what language you want, it uploads some software to the flash loader, then you go out & pull your current configuration from your car via the OBD-II diagnostic port following the supplied instructions.
Once you've got your vehicle's file in the flash loader, you download it to the PC you're using, then EMAIL it to GDE. They respond back (my experience was same day) with your eco-tune. Save the file to your PC, upload the tune to the flash loader via the control panel program, then go out & program your car. You will see all sorts of wonky error messages on your dash while the vehicle is being programmed along with audible alarms (mine showed the low coolant, engine off red alarm, ESP failure alarm, etc...) along with warning lights for temp and fuel level. Once you shut off the car and recycle the key they all go away. The entire process took around 20-30 minutes of time (not counting EMAIL time delay). I did my adaptation drive last night to Orlando and back so the car could re-learn since it has been re-flashed.
So far I've noticed that turbo lag seems to be completely gone, where before I had noticeable lag for 1-2 seconds when I went to WOT. Also the car does seem to be more responsive and a little more peppy. GDE claims roughly a 30HP gain using their tune and increase from 369 to 410 ft/lbs torque. 0-60 times up to 7.3 seconds from 8.0-8.1 seconds average. Fuel economy seems to be a bit improved, I was reading in high 30's for average MPG on the way to Orlando and back. GDE claims gains of 2-4 MPG if driven "conservatively", however time will tell on that one. Best I have done with the car so far was 39.6 MPG average, but that was after a 785 mile steady-state road trip down I-95 from DC to Central Florida. I'm getting ready to take a 3,000 mile driving road trip in mid-May so I'll have much better data after that trip.
The problem with doing the tune is that it's cost-efficient only (looking strictly at business case here) if you plan on keeping the car for a long time. At $700 out the door shipped it's pretty pricey for a box tune even if you do receive a flash loader, but since I plan on keeping the car for a while I decided to try it out. Just getting rid of that turbo lag was a very noticeable positive right away.
2005 E320 CDI model 211.026. Getting groceries at a store near you!