I installed the Green Diesel Engineering tune last night on my 2006 CDI with 78k miles. The process and instructions are fairly simple. You connect the device to your (Internet) PC and it automatically updates to it's latest version, and loads the dashboard on your PC. Then you connect the device to the ODB port on your car, and it reads and saves the current OEM ECU tune. Next hook the device back to the PC and download the tune file to the PC and email it to GDE support. Within a few hours I received an email back with the new tune file attached. Connect the device to the PC and upload the new file to it. Then connect to your car and load the new tune. During the load, my dashboard displayed a bunch of error messages and the radiator fan came on. This is all normal according to GDE. It stops once the load is done.

I took a 40 miles test drive. The cars display says I got 37mpg and averaged 38mph. As advertised, it appears to be a few mpg better than before. Throttle response seems more linear. I'd compare it to driving a car with a V8. It pulled strong before, but even stronger now. With the ESP off, it'll easily spin the rear tires from stop.

Is it worth the price? For me, yes. If I was living paycheck to paycheck, then no. The car ran really well stock. It's just a bit better now. But the device does all I was looking for. Better and more linear acceleration. Turn off the EGR valve. Better MPG. I can read and reset error codes. And if I want to switch from the GDE tune back to OEM for some reason, I can. And if a dealer or independent manages to somehow erase the GDE tune years from now, I don't need to contact GDE to reload it. It's all self-contained in the unit.

I'm happy.

Wanna race?

I'm still debating....car drives so fabulously as is. I would love to get rid of the EGR...and more power on the cheap is certainly welcome. Not convinced of claims of fuel economy improvement....didn't see any improvement on my chip tuned 98 E300.

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 159k miles
06 E320 CDI "Rutherford", Black on Tan, 178k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 145k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 75k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

What would your car's display have been before the tune ?

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Greg
2012 S350 BlueTEC 4Matic
2007 ML 320 CDI
2007 Leisure Travel Serenity
2006 Sprinter 432k
2005 E320 CDI
1998 SLK230 (teal)
1998 SLK230 (silver)
1996 E300D 99k, 30k on WVO
Previous:
1983 240D, on WVO
1982 300D, on WVO
1983 300CD, on WVO
1986 300SDL 237k, 25k on WVO (Deerslayer)
1991 350SDL 249k, 56k on WVO - Retired to a car spa in Phoenix
1983 380 SEC w/603 diesel, 8k on WVO
1996 E300D 351k, 177k on WVO