2021 GLC 300, 2016 E63s, 1985 380sl, 1989 BMW E30, 2012 Audi A4, 1972 and 1974 Norton Commando
Gents - Thank you for all your comments. My mechanic has dug in, and I do indeed need a new pump ( as mentioned by some above. Finding a pump is now proving difficult. I will reach out to the contacts above (thank you @natejgreene9871 ). Would anyone here have one they were willing to sell, or a have a lead on one?