I'm glad my older model doesn't have that feature. If it did and it became disabled, I would certainly leave it that way.

 

Better double check you duplicated posts, I only see a standard battery replacement video???

 

If anyone is concern about losing any electrical set devices during a battery change there are power supply equipment that plug into the OBDII Dianostic connector that will maintain 12 volts during changing the battery. You can get them for less than 20 bucks most anywhere that sells auto parts of naturally from amazon, eBay and Walmart.
Sorry I can't find mine to show you. Seems someone borrowed it from my tool box and forgot to return it.

 

Hello. Thank you everyone for the insights. It was very cold here and I did not want to wait for a memory saving adapter and just went for it and swapped my battery for a new one. My old battery had not failed, but it was due and the next several days are going to be subzero. So, here’s a datapoint. The swap took less that 5 minutes and nothing seems to have been lost. My “favorites” including radio stations remained. Maintenance service alerts remained. My fan/heater/defroster had to be re-selected. One weird thing occurred. The temperature gauge display in the right side display started moving from cold to hot, off the scale and rolled around again. It stopped doing this, so …. I think I am good.

 

So the 335 has been throwing the increased electrical discharge warnings again. So I took it to the garage and it turns out the car still has the 12 year old original battery in it and it's very weak.

The mechanic recommended I could try charging it up overnight using something like the CTEK to see if it could give it enough of a charge but it's an old horse & will probably need a swap. For the health of the Car Battery Change in Abu Dhabi, I'm looking to replace the battery and want to know the best way to go about this.

The BMW specialist I take my car to has quoted me £200+ VAT (not including labour) for the whole thing.

£150 quotes by Halfords including fitting & warranty.

My question is - is this the going rate for a battery replacement (never had to replace one before) & what's the deal with coding batteries that I've read on a few threads. I want to change it over as safely as possible but as economically too - more leftover money for upgrades (and the paintwork repair - If you've read my other thread)

Also, with the whole battery changing jazz - would the fact that the ECU is flashed to MHD stage 1 affect anything at all?

 

So the 335 has been throwing the increased electrical discharge warnings again. So I took it to the garage and it turns out the car still has the 12 year old original battery in it and it's very weak. The mechanic recommended I could try charging it up overnight using something like the CTEK to see if it could give it enough of a charge but it's an old horse & will probably need a swap. For the health of the car I'm looking to replace the battery and want to know the best way to go about this. The BMW specialist I take my car to has quoted me £200+ VAT (not including labour) for the whole thing. £150 quotes by Halfords including fitting & warranty. My question is - is this the going rate for a battery replacement (never had to replace one before) & what's the deal with coding batteries that I've read on a few threads. I want to change it over as safely as possible but as economically too - more leftover money for upgrades (and the paintwork repair - If you've read my other thread) Also, with the whole battery changing jazz - would the fact that the ECU is flashed to MHD stage 1 affect anything at all?