fox72

I hope this thread is helpful. Here I give a slightly modified version of the topic that was once started by Znod.
At 2700 km in my 520d the on board computer mentioned an average fuel consumption of 5.7 l whereas the actual calculated fuel consumption was 6.6 litres. I did the following steps:

1. With the engine off, insert the key and press down the start/stop button twice. The date and outside temperature should appear.
Hold down the km/miles reset button. A warning triangle appears first. Keep holding the button until menu 1 appears.
2. Press the button sequentially until postion 19 appears.
3. Wait a second or two, until code -- appears. Without hesitation (otherwise the -- disappears) press the button again until you reach the calculated code, which is the sum of the last five digits of your VIN.
4. Now wait: "unlocked" will appear and the menu will go back to position 1.
5. Now toggle through to position 20.
6. Once you get there you can adjust the default value of 1000. I adjusted to 1090 as I calculated that the actual fuel consumption was approximately 9% higher than predicted by the on board computer.
7. Now go back to menu 19 to lock the menus again by pressing the button
8. Remove the ignition key.

I keep my fingers crossed - will see tomorrow if this was adequate.

Bart sMartWeed

I have the same problem I wonder if your method worked. Please tell me. Thanks.

Bart sMartWeed

I tried myself. For some reason the correction value was 772 and I changed it to 1000 (I guess this is the default). Result: the consumption gauge and average value seems a lot more realistic. Now I will compare the values with the real consumption and calibrate again when needed.

narvselius

I've updated mine today. On the LCI cars there are some minor differences, or if this is due to the new software, but it was very easy. I ended up in another folder at one occasion, and that was really funny. Try 01.02!

narvselius

After adjusting +4% to "1040", the average consumption is correct! Amazing stuff...

trapper

Although I prefer consumption as Miles per Gallon (Imperial not US) I was wondering if this would work on my 2005 E61. It does not have the start/stop button so anyone know of a way to do the adjusment?

525d MSport

Try just turning the key to the first position and following the rest of the instructions.

Regards

rsyed

Amazing instructions - my stealer told me that a correction was not possible. What a joke....