The comments repeatedly funnel buyers to a small circle of specialists: Star Motors of Endicott NY, Karl Middelhauve, the Mercedes Classic Center (Long Beach and Stuttgart), Kienle Motors, and the M100 owners group. Some parts are described as no longer available (suspension bellows) or agonizing to source; one owner spent three months and traveled the world to find an ignition lock, whose removal alone took 15 hours.
Parts availability and the specialist network
Mercedes-Benz 600 Grand Mercedes (W100) · ownership