What would most people do under there anyway? Hell most people never open hoods in the first place under warranty so it wouldn't matter to the manufacturer.

 

https://carbiketech.com/mercedes-ben...-body-control/The more widespread example of 48V-powered suspension systems are Active Anti-rollbars, which are in top-end Audi, BMW, and others.

 

This is also a good example but Mercedes' system kills this, BMW had this in 04 on the 7 with a hydraulic repair existing that was a nightmare to deal with and work on. Never worked properly......

 

Somehow this has never been an issue with the many, many hybrids on the road.

Non issue.

Like Striker said a car with a 12V electrical system just doesn't have the power to operate a system like eABC.

 

I mean you CAN do it with a 12v system.....it's just going to be huge and heavy plus cost way more. Just makes no sense when you can 48v it instead plus you avoid voltage droop on top of the much lighter/thinner/cheaper wires as well.

 

Can't do a system as sophisticated as eABC...the X factor is the ability to raise the vehicle at each corner within 1-2 seconds.

 

You absolutely can, it will just as I said be stupid to do so with a 12v system vs this. It's not a can't be done sort of deal it's a can't be done in a sane manner.

 

thanks. i don't get the 12v vs 48v though because volts isn't power and i thought mb had eabc on vehicles without 48v in the past.

 

Basically Voltage is the pressure from an electric circuits power source that pushes electrons. The more voltage, the faster it pushes the electricity. Higher pressure means larger push. You need that larger push to run things like electric AC, superchargers, and electric motors. 12v would run your instrument cluster, lights, indicators etc.

 

Well, Mercedes engineers don't agree. I will post the engineering article later in the post.

They had similar systems before, such as ABC and MBC, but eABC takes it to another level where you have the ability for the suspension to apply much more pressure at each corner, enough to raise the entire vehicle 3 inches in 1.5 seconds.

Exactly. The battery unit in the 48V system also allows the car to store far more power and apply that power in more ways at the same time without the engine operating. Thats why you can have all the AC and accessories run exactly the same when the engine is off, and you can do away with a traditional starter and alternator. The battery has enough energy to spool the engine up itself just as in any traditional hybrid. There are no belts, so all the vehicle's electronics run off the hybrid battery and the engine charges that battery like in any other hybrid.

If you want to read more about it:

https://automotivetechinfo.com/wp-co...y-48-Volts.pdf

Some important excerpts

 

Wait, that's supposed to be a bad thing?

 

BMW had this system for a long time, maybe it wasn't very reliable on older 7s, but they have been generally reliable for at least a decade now.

 

The BMW active roll stabilization worked fantastically well. Had it on my E60 545i and 550i and it was a must-have option. It kept the car flat absolutely through even the most aggressive cornering and it really made that car special. Still to this day two of my favorite cars. And it would have been even better with a 48v system underpinning it.

 

thanks for pasting the excerpts, good stuff.

once again, mb leads...

 

Active roll bars... ugh. Anything[A/M]BC or any remotely equivalent active hydraulic suspension, Tenneco's (well, ex-FSAE UWA) kinetic (McLaren, a bit of Nissan Patrol and a very bastardized version in some Toyota SUVs) blow classic sway bars (active or otherwise) completely out of the water. As for active sways - BMW's had a hydraulic system for awhile, Lexus' had an electric system (with a separate battery, inverter & etc - took away the spare tyre on a 3GS).