Assuming you're in the U.S. there was no 260E until 1987. In all likelyhood your car is very similar to the U.S. 86 300E and 87 260E - but these are obscure questions that you will need to learn to research yourself. The international version of the EPC would be the place to start. It's not clear to me if that's extra cost or what you get for free in the U.S. Let us know if/when you find out.

https://epc.startekinfo.com/epc/welcome.jsp