Good question. I am actually wondering the same myself since I received a hitch/towing setup with a set of Gen 2 Eurobumpers. I have however not installed the towing setup yet since I am not sure if it is worth it or not, i.e. install it or have some bodywork done on the bumper to close the opening from the hitch.
Original trailer is fixed somewhere under the bumper. I had it on my old 500SE, rated up to 1900kg.
On W124, if you have a trailer then you have trunk reinforcements, not sure about W126 - here they don't even allow you to have a trailing device installed now (there's a big bold warning in their datasheet saying not to allow that - don't ask me why because mine had original from Germany - maybe an obsure custom option?).
I wouldn't install anything but the original one, on W124 the rear window wiould crack often without proper instalation...
I have not seen them much in the US, but it seems to be more common on cars in Europe. The trailer hitches are attached to the bumper, plus the reinforcement you see further in on the car. My personal "concern" is the unnecessary extra weight added for something I would not use much at all, but mostly the ugliness of the thing. Therefore I am leaning towards fixing the rear bumper at the body shop instead of installing the trailer hitch that the euro bumper came with. I still have the W210 wagon if I want to bring bicycles...
With SLS there should be no trouble with tongue weight. I am concerned that the mounting on both hitches shown, that someone would overload it. I would prefer to have the hitch tied into the bumper mounts as in a flat plate with tubular Ties between to be a class III hitch. The Hitches shown work for small trailers. Perhaps a 13 ft. pop top camper or a 2 horse trailer, nothing bigger. The hitches shown appear to be a Class II hitches.
I don't think I would tow a trailer with mine, but I would love to have one just for my hitch mounted BBQ pit. Even though all of my friends said I'd have to wear a mullet wig and my girl wouldn't ride with me.
Just have to keep using the trail rig for that till I find one.
LASwede, let me know if your not gonna use yours, I may look into getting it off ya just to have a laugh at my next BBQ.
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