An update on the service...

The reprogramming has definitely made a positive change in the way the car drives. It feels noticeably smoother during acceleration and the lag appears to have disappeared. I hope this reprogramming will not result in higher fuel consumption.

A surprise... they no longer flush the DEF at the first service - only top-off. Apparently there is a bulletin on it. Does anyone know which bulletin?

My invoice includes the DEF line item (1 83-19-0-440-158) but doesn't say how much they put in it. I asked but they couldn't answer that. I'll have to take their word for it - for now.

I had requested tire balance and rotation which they did for free (so much for the BMW recommendation about no rotation!)

On the way home, I checked the oil service indicator in iDrive. It says 700 mile to next oil change!! I guess this number will increase over time. Or has BMW changed its policy and now doing oil changes every 700 miles:rofl:

Looks like they did everything right BUT reset the CBS data... They can reset that in the service drive, or you can even reset it yourself if you want.

Ummm... actually it does say how much DEF they put in it. 1 83-19-0-440-158 means your paper work says they used ONE 2.5 gal jug of DEF (part number 83-19-0-440-158). Which is quite a bit short of the 6+ gals that would be need to completely fill both DEF tanks if they were empty. And probably a good deal less than the DEF used by the average 35d driver per oil service. But we really don't know these DEF consumption figures yet since BMW is keeping this info pretty close to their vest :(

Funf Dreisig

Thanks Weasel and Funf Dreisig!! Looks like I will be visiting the dealer again. Do you guys know if this bulletin about not doing a flush is actually true? They told me they no longer flush the DEF system at the first oil change because of a recent bulletin. Apparently DEF now has a different flush service cycle.

AFAIK you are the first to report about any changes in the DEF "flush and fill" procedure. But several of us have previously speculated about why BMW would go to the trouble of flushing and filling the DEF tanks at every oil service unless it was on a very low mileage/yr 35d where the DEF could potentially 'go out of date' before it was consumed.

Funf Dreisig

Just got my '10 35d back from its 10K service (odo was 10.8K) and noted 4 DEF units were used, but no mention of flush.

Did your service light come on sometime before service?

Any software upgrades? Does it operate any differently if yes?

This is interesting because the combined capacity of both reservoirs is about 6.1 gallons. Assuming each can is 2.5 gallons of def, they should need less than three cans of the stuff for a complete flush.

And yes it is true, they did change the DEF service procedure to top it off now...

Wow, so you could go 4 years without a DEF flush?

if you fail to trip 6000 miles per year, you will go 2 years to the first oilservice, and only get a top off.

Can they retroactively change the service requirements for a car already purchased with a documented warranty plan? Hmmm.