Pretty cool, a first for me. I just ordered a owners manual (copy) from Stihl yesterday. The lady said it had all the variations in it.. 015, 015L, 015AV, etc. Lets see if the R model is listed and maybe shed some light on this.
The owner manual came from today Stihl, but all it addresses is the 015 and 015L. The thing I found interesting, is that the only difference between them is the L in 015L signifies throttle trigger inter-lock and a hand guard, whereas the 015 does not have those.
So my theory that the L meant electronic ignition went out the window. That would be the 015AVElectronic