Great find!

Your going to want to change all the fluids an filters since they are so old, transmission, rear end, coolant, power steering, air filters for both the engine and climate control, etc.

If the tires are original they are also shot, replace them regardless of how good they look. 16 year old tires are a blow out waiting to happen.

Check the battery too, if they managed to limp the original one along its done too.

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2006 CL500
2009 C300 4matic
1969 280SE
2023 Ram 1500
2007 Tiara 3200