Hello my MB CL family!

Spring fever has forced me to actually wash the car and vacuum the interior. I tested all systems, and after replacing all the tires (with UHP General Exclaim), front wheel bearings (they only sell assemblies that include the hub), and fluid changes, I find out I can't get a massage.
The seats adjust fore/aft, up/down, but the lumbar, bolster, massage system is out. In both front seats. I hear a click but no pumping and no action. Where should I look first?

BTW, the General tires are excellent and the best value as far as I'm concerned. extremely quiet, grips like rubber cement, and very reasonably priced at tirerack. 245/45/ZR18s and 275/40/ZR18s.

Cheers!
Ray

 

Gosh, no takers?

Am I alone in this CL600 world?