Mid range Mercs have always been available in “limo” form but it is has always been targeted to hotels and airport transfer companies. The accent is not luxury. The earliest I have seen these kinds dates back to the late 60′s 200 to 280 dash eight (-8). The configuration is always 6 doors and forward facing foldable bench seats for the middle position. It is a true people carrier. The picture shows the car not to have door handles in the middle section, but then it does look like a temporary door cobbled up for testing. The 3 foot extension indicates that a full door is planned as usual.