c400ry

For the life of me I can't figure how to keep the rear wing extended whether when driving or always extended. When driving it hit the button and says extending (or whatever) then little icon shows it extended. After a few minutes it shows not extended. I did try turning off ignition and turn it on accessory. Then hit button to extend. Then turn all way off. That keeps it extended. But when I start the car again it seems to go back down. Online owner manual doesn't seem to be clear. Any help???

G. P

as far as I can recall even if you extend it manually, when you cross over about 40mph and then go below it, I will retract the wing. I don’t believe there is a way to prevent it, unless you change the electronics that control the wing.

c400ry

Really? That seems dumb. Thanks though, if anyone else knows differently please let me know.

G. P

I agree. but I think it's done for MB to get a better fuel economy rating.
In any case, there is a fixed rear wing available for this model. You can easily take out the electronic one and replace it with a static one (for the GTC you will need additional gadget to trick the system into thinking the electronic one is there)

AndrewFerg

Lots of discussion on this topic here. Just search it. I agree it's irritating. I personally couldn't stand it going up and down all the time so I got a fixed wing. It was a pretty easy install. I haven't noticed any reduced mpg.

Wolfman

https://mbworld.org/forums/coupe-roa...r-wing-up.html