im stateside with the 280e. the brake booster was filled with brake fluid. what makes and models of other benz can I use. im not a purist . and im not looking to spend 300$ on a new one either

Other members will have to chime in on compatibility, but if you're able to find a used one and DIY it, that'll save you some $$. Link to the tech article below:

Mercedes-Benz W123 Brake Booster Replacement | W123 (1977-1985) | Pelican Parts DIY Maintenance Article

I've got one in a 79 280E but I never drove the car so it's "as is". you would need to check fitment. $50 includes shipping to you in NC.

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Hanno
'79 6.9 Sold (after 27 years)
'83 280SL, 5 spd.
'94 E320 Sdn. 5 spd conversion
'02 E320 Sdn.(on loan to mom!)
'87 300E (5 spd. conversion) Sold
'05 E500 Wagon

First I would remove the booster and throughly inspect it. As long as there is no damage to the rubber inside, it should be OK after a complete cleaning. The brake fluid can only come from the master cylinder, which obviously needs to be rebuilt or replaced. A lot of times they will leak fluid either on to or inside the booster after bleeding the system. To prevent this put a piece of wood, like a 2x4, on the floor so that the pedal doesn´t go all the way to the floor during brake bleeding.

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