Those are two of the best modifications (and the first aid kit also) you could make to that coupe. You won't regret making them. Mercedes meant for the car to have those features, it was the USA DOT lawyers, in their infinite wisdom that decided American buyers didn't need them.

My car has all three of those and I am glad I have them all, looks performance, safety that Mercedes intended.

Good luck on the winning the auctions. esnipe and other free services are supposed to guarantee a win in the last seconds. Hopefully you already have sorted out method of payment and shipping costs before you win the auction.
I've been very happy with ebay UK and ebay Germany in transactions like this

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1991 560 SEC AMG, 199k <---- 300 hp 10:1 ECE euro HV ...

1995 E 420, 170k "The Red Plum" (sold)

2015 BMW 535i xdrive awd Stage 1 DINAN, 6k, <----364 hp

1967 Mercury Cougar, 49k

2013 Jaguar XF, 20k <----340 hp Supercharged, All Wheel Drive (sold)