SL/R107: Brake pedal return
06-08-2018, 04:53 PM
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1987 560SL
Brake pedal return
I have an '87 560 SL and last year had a complete brake job done, Recently I went to drive the car when I notice the brake pedal didn't return to the up position when I let up on the pedal and shortly afterwards I started hearing a hissing sound like air coming out of a hose. Is this some kind of vacuum leak? Any ideas or suggestions?
06-09-2018, 10:22 AM
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450SL
There is a spring to return the pedal. The hiss could be the diaphragm in the power brake booster ruptured. Where is the vacuum/economy gauge needle when the car is running?
06-09-2018, 10:28 AM
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1987 560SL
06-22-2018, 11:54 PM
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1987 560SL
I checked the economy gauge and it read zero or economy, when I would rev up the engine it would make a slight movement and then settle back to a zero level.
As it turned out the brake pedal returned on its own after several brake tests.
As it turned out the brake pedal returned on its own after several brake tests.
