Hi Larry,
Dan is right. 113 and 111 taillights are very similar/mostly identical but the bezzel is different and not interchangeable.
For the clear differentiation of early tail lights versus late tail lights please refer to our Wiki:
http://www.sl113.org/wiki/Electrical/TailLightsThe same holds true in the analogous manner for the W111 Coupé/Cabriolet.
I think from your comments you are referring to the early style and not the late style.
The early style is no longer available from factory.
This is extremely sad because the originals (early style) with amber turnsignal lens portion were available from factory until about half a year or a year ago at a very reasonable price! However, now they're gone!
Only replacements are available today and for these there are (is a) manufacturer/s who make/s only the lens and mirror for the early style, both, with amber or red turnsignal light.
The originals were solid-colored and the reproductions are clear and just sprayed red (or amber) from behind but from 5 feet you cannot see the difference
(in the real life you can because the originals had a slightly brighter red color tone than the reproductions which are too dark).
Nevertheless, correctly fitted repros (see Jonny's comments) in new bezzels look great even from closeup and are hardly to be distinguished from originals.
As to Jonny's comments regarding the 250
CE ...
ah no, the W114 never had a 108 tail light unit or part, never ever. Those 114s always had own tail lights with a 114 or 115 820 parts number, nothing else. Perhaps the side marker lenses .... yes, those might have had a 108 parts number. Most likely you mean the 250
SE (sedan, not Coupé)... yes, that's a 108 and thus has 108 tail lights ...
Ask me how I know...
Achim
(who's member name is 114015)