I think I need a new master cylinder for my 450 SLC 1980. Now I just have to figure out which one. Fastlane shows two for two different chassis. Here they are 007850-011199 and 011200-020046. I was comparing the pictures with my current master cylinder and the closest one to mine is the 011200-020046 but I dont have the brake pressure sensor. My car's chassis number is WDB 107024 12 030496 1 and Engine number is 117985-12-053858. Can somebody sort this out for me. Thanks a lot.

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1989 260E >105K
1980 450 SLC 22k