Hello All,

Working down the short list of annoying problems, I have non-functioning orthopedic seats in my 1991 560sel. They simply stopped functioning recently with no particular preamble to the failure. Is the air pump for these driven by the vacuum pump under the rear seat or is there a pressure pump specifically assigned to this task? If this latter proposition is the case, which fuse might be a possible culprit, and where would that pressure pump be found?

Thank you, in advance, for your insights.

-Stu