Interested in an S 600 l

Hi am new here with you . I have read a W 124 convertible (E220)Bj 12 1996.Since my wife is now ill with M.S and no sun can tolerate anymore I have read an offer from D.C. dealer :W.220 600 L Bj 2000 128 000 Km full equipment ,Linguatronig ,Memory front+backs ..and.. and etc. Can someone give tips or other hints (customer service etc.) to the type .I will then give my Caprio in payment.For all answers I would be very grateful.(I love also with a CLS 350 and will d (e. g. weigh up)