Good news: I found out where my brake fluid is going. Bad news: My clutch master cylinder is leaking.

The car is a federal '83 300D which was converted to manual transmission using a '77 240D as a donor. The conversion was done in 2010 and the master cylinder was replaced at that time. The car has only done 17,000 miles since the conversion. The brand on the master cylinder is FTE.

Should I just slap another one on, or is there something I should be looking at that may be responsible for the failure? The brake master cylinder failed and was replaced a few months ago, in case that may be connected in some way.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.