Back seat option, when did it start?

[rickjordan]

This is my first posting on this forum. I already have one Benz, and of course would like another. My current Benz is an '80 300SD which is best suited for highway driving. I have been thinking of getting a SL for around town/back road driving. The only catch is, it would be best to have a back seat for my 2 kids, 9 and 5 yrs. old. I have given thought to a SLC, but I like the SLs better. I know that there was an option for a back seat and was wondering when that was started. This would help me focus on certain years. I am interested in the 107 series. The president of the local MBCA chapter owns an '86 560SL that he had the rear seat installed, to accomadate his 2 small kids. Thanks in advance.