Aesthetically there is NOTHING more pleasing than a set of Euro lights on a W124.
First time I saw them was when I was crossingt the street in Lima Peru and a W124 E220 coupe had them. They looked awesome.
Especially without the headlight wipers, though if you retain them, and can afford it, get the euro headlight wipers, which point inwards and have the cleaner euro look. (That would be more expensive, though, significantly unless you can get them on ebay) but they would work the same, and probably you would need also the panel below the lights to be replaced for the euro wipers. (not sure of this.)
The best look of all would be to simply remove the headlight wipers, fill in the hole on the panel and paint over it, because the cleanest W124 look of all is the euro lights without the wipers on them. (AND hey, do you really need them anyway? Maybe in Germany with all the winter slush on the roads, but do you drive in those conditions that much anyway?)
I bought the Eurolights for my W126 from Capitol West in Sacramento some years ago, and they came with the Euro corner lights, much darker orange than the US corner lights, so I swapped those also, they look better with the darker orange.
But, the W124 you have, looks good with clear corner lights though
Another thing you are going to love about your new Euro lights, is they are much brighter AND when properly aligned, throw out a MUCH better pattern of light on the road ahead of you, than the awful US DOT headlights ever did.
Though technically, your Euro lights are illegal, because not DOT approved,
and are "For off road use only" heh heh.
But I've NEVER heard ever for the last 10 years, of anyone getting ticketed by some rule crazy cop for Euro lights on a Mercedes- probably a cop wouldn't know the difference one way of the other, Euro or DOT legal.
Might be tougher to find new Euro ones to replace them if they got busted up in a collision though.....
Congrats, excellent modification to make on a W124