Question about Mercedes-Benz S-Class

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I have to press harder on my pedal these days to get my car moving. feels like there is resistance down there. what do u think?. i own a mercedes benz s500 2002

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Pedal pressure should remain uneffected by anything short of the linkage or cable getting jammed up. You should get this looked at if it truely is getting harder to push then it becomes a possibility for the pedal to get stuck while your driving.

Posted on Mar 26, 2011

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Posted on Jan 02, 2017

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The engine surges on my 2007 when i step on the brake


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yes but up to a point
the brake pedal should move about 1" to take up the pedal free play and then be applied smoothly as you press further
the harder you press the more solid stopping action you will get
that way you can feel the brakes working so that you can adjust the braking action for stopping
there should be no hissing noise that occurs when the brakes are being applied
you say hydro booster which is hydraulic booster but a hissing noise will come from an air leak in a vacuum brake booster which indicates that it needs repalcing

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Often times, the throttle plate gets gummed up and sticks.
One main reason is because newer cars have throttle bodies that are horizontal instead of vertical like carburetors once were.
A mechanic or DIY can spray cleaner into the throat of the throttle body to clean the plate. You may need to spray some lube onto the linkage too.

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Why is the break sometimes high and sometimes low


not sure if you mean while driving or when parked with the ignition off but here are a couple reasons on why the brake pedal may be high and low at different times. If the vehicle is running the brake pedal will feel the same just about every time. If the car is off and you step on the brakes it will get harder and harder to push down since there is no vacuum assist. Another reason would be the brake pad thickness. New brakes the pedal will feel higher where as worn brake pads the pedal may feel lower. Another reason would be if you have air in the brake lines. this will make the pedal feel mushy and soft at first and firm up as you pump the brakes. Hope this helps.

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When driving at 15 miles, the car is usually on second gear, when pressing the gas pedal, one of 3 things happen, it easier feels as a little jump occured, or an increase in RPM, that settles down shortly...


I would suggest a service of the automatic transmission where the filter will be cleaned, bands tightened and new transmission fluid put in. the autotransmission is often forgotten about in our car servicing.
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When engine is running and you press brake pedal it will have pressure the tavel to the floor. but when you turn off engine pedal is hard.


sounds normal.... when the engine's running, there's power assisting you as you brake to move all that hydraulic fluid from the master cylinder to each of your wheels... when the car's off, there's no power assist as you press on the pedal causing it to feel hard as you have to use your own strength to push on the pedal. also with the car off, the fluid pressure just keeps in the line and is not returning to the master cylinder, causing that pedal to feel harder with every press

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1 Answer

My gas pedal gives me a lot more resistance than it used to.


try to spray some w-D 40 on the cable while some one works the pedal

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