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Old 06-25-2017, 09:57 PM
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Diseasel300 Diseasel300 is offline
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Join Date: May 2016
Posts: 6,032
I kinda figured that would be the case based on your description of the problem. Pressing the brake pedal doesn't do anything to the engine other than change the level of vacuum in the brake booster. If the diaphragm cracks or tears, it's time for a new one. Not only does it cause a vacuum leak which affects running, but it also reduces your braking power due to lack of assist.

Time for a brake booster.
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Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

Black Sheep:
1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)
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