There are several companies that offer refurbished M-B electronic components; check the M-B Club of America's publication [The Star] for a full listing of advertisers: one company is Beckman Technologies (800-742-1021); another, CCI/Uptime may (?) now be selling only through resellers such as the Brinson Co. (800.434.8788). You may also want to check this site's "Parts Shop" for availability. Expect to pay approx. $210 for a refurbished pushbutton control unit.

M-B's part no. for the Model 124 Automatic CLimate Control Service Manual is S-2380-000. For those interested, the manual offers a thorough explaination of individual components and nominal values but please note that ACC component testing and fault diagnosis in this model is not for the average DIYer.