A friend with the same Grohe galley sink faucet in a C400 that we have in the C34 MK II passed on the serial number for the "ceramic headport" required if your faucet begins to drip or the action on one of the faucet handles becomes overly rough. It is: Grohe 45 882 000 883. They are quite expensive but even if you need two the total is quite a bit less than replacing the unit.
I haven't done this yet so please bring along your faulty "headport" to be sure that it matches the one you are being offered as a replacement.
What ever happened to faucets that only required a replacement washer?
...... What ever happened to faucets that only required a replacement washer? ........
They went the way of the Dinosaurs !! Now you know why Grohe practically gave those faucets to Catalina. Just like the tobacco companies that "gave" away cigarettes in the military rations!!