I sent thefollowing message to them:

Just an FYI:

The vehicle is just a standard 450SEL 4.5, not a 6.9.

A 6.9 has the self leveling suspension, with a push pull knob on the dash above the steering wheel. The 6.9 also has upgraded “burl” woodwork. Lastly, the 6.9 has different bumpers, and most have rear headrests.

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1959 Gravely LI, 1963 Gravely L8, 1973 Gravely C12
1982 380SL
1978 450 SEL 6.9 euro restoration at 63% and climbing
1987 300 D
2005 CDI European Delivery
2006 CDI Handed down to daughter
2007 GL CDI. Wifes