Rich9300

I have a 2019 E53. It has EQ Boost, which performs very well. My question is simple but I am unable to find the answer using google searches. Is the 48 volt EQ Boost battery charged at all by the engine or just by braking? There is a Consumption graphic on the Comand system, the top half of which shows gas consumption per adjustable minute intervals, and the bottom half shows battery charge % for those same intervals. If I'm braking a lot in city traffic, the charge % can get up to 50% or very slightly higher, but never approaching anywhere near 100%. Usually it's about 20%. I'm sure this charge % refers to the 48 volt battery. How come the battery never shows a full charge? This has been the case since the car was new. There's something I'm not understanding here.

bobblehead

The primary methods for the recharge is done thru coasting and braking. I guess if you don't do enough of either tasks, then it will never reaches the upper tier of the charge % level.

fpuhan

+1

Rich9300

I'm probbly worrying about nothing. I had Service B a couple of months ago where I'm sure it was all checked out. I've had the car for two years and haven't had a problem. Although I have a CTEK charger I'm afraid to use it on the theiry that "if it aint broke, don't fix it." Thanks for the responses.

MBS E53

Where exactly are you finding this graphic/display?
In my experience charging is achieved by braking/coasting.