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Break fluid reservoir cap size?

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Old 09-16-2024, 09:25 PM
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2015 C400 4MATIC Palladium Silver Metallic
Break fluid reservoir cap size?

Does anyone know which "Euro" break fluid reservoir cap adapter size is correct for the W205?

Specifically for the Aeromotive power bleeder kits?
Old 09-17-2024, 08:02 AM
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'15 C400 and '15 ML350
I ordered this one for mine and it fit no problem:
https://www.fcpeuro.com/products/mas...facturing-7029

Shows
  • I.D. = 42mm
  • O.D. = 57.5mm
Hope that helps

Old 09-17-2024, 08:18 AM
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G550
BTW, it's "brake", not "break". Those of you who were taught homophones are interchangeable were misled.
Old 09-17-2024, 09:14 AM
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Originally Posted by MatthewJ
I ordered this one for mine and it fit no problem:
https://www.fcpeuro.com/products/mas...facturing-7029

Shows
  • I.D. = 42mm
  • O.D. = 57.5mm
Hope that helps
Ok thanks. Interesting that the recommended Motive adapter says it's 45mm
Old 09-18-2024, 04:08 AM
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2015 E400 Sedan
45mm could be the thread OD where as the 42mm would be thread ID and OD he lists is well OD of cap.

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