The 1965 Mercedes-Benz 220SEb 2.2L M127 Inline-6 Mechanical Fuel Injection repair data is free for every DIYer and shop on earth, permanently, because Open Labor Project paid $99 to unlock it.
Mitchell1 charges $169/mo for this. ALLDATAdiy charges $30/yr per vehicle. Open Labor Project is free permanently, because of community sponsors like Open.