I'm looking to buy a fuel pressure test kit for my 124 and 129 to test pressures at the fuel distributor primarily and fuel pump. I want to verify that both are within their designed ranges.

I noticed that the Harbor Freight folks have one but it specifically states that it doesn't fit Bosh and CIS systems.

I'm assuming that this is an adapter issue. What do I need to look for?
Any recommendations?

Thanks.

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03 CLK430 Cabrio 211K Pweter Silver/ Oyster Leather
90 300SEL 214k Pearl Black/ Alto Grey/Black Leather

Prior: 85 190E, 88 300TE, 89 300TE, 90 300E 2.6, 90 300TE, 92 300E 2.6, 91 and 93 300SL, 87 Ferrari Mondial Cabrio