When I was looking (UK) I was told the 43 couldn't have a towbar / hitch fitted, I needed one fitted so went for the 350D AMG Line. I was also told the auto boot (trunk) opening wouldn't work, it did,
So, I assume it various from region to region?
I know it's not 100% relevant to your question, but I have a factory fitted towbar and the wavey foot thing opens the boot/trunk..
My salesman said the 43 couldn't have a towbar because of the body mouldings...??
Graham