1996 Mercedes Benz C280 Possible Vaccuum leak

SIMERY13

MEMBER
1996 MERCEDES BENZ C280

Engine problem
1996 Mercedes Benz C280 Wheel Drive Type unknown Automatic 162288 miles

I have a 96 mercedes c280 that I believe has a vacuum leak because I can hear a hissing noise early in morning. Its also running kind of rough I already change spark plugs and wires and egr vavle but I don’t believe they was gap correctly they was platinum plus that I was tols was pre-gapped I am a female so I don’t know allot about cars but know enough. I was told it could be a leak in the intake manifold but dont know where this is located. Will this be hard to fix? And if you suggest other areas to look let me know. Signed a female looking for a resolution.

4 Replies

BLACKOP555

MECHANIC
10,371 POSTS

To find the leak simply start it up, get some starting fluid or carb cleaner and slowly spray all the vaccum lines and the intake manifold around the base by the gaskets, if idle changes you have found the leak.

Not too hard to change.

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Wednesday, January 9th, 2008 AT 8:27 AM

SIMERY13

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3 POSTS

Do u know exactly where on this car the intake manifold is located?

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Wednesday, January 9th, 2008 AT 8:29 AM

BLACKOP555

MECHANIC
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Simplest way to put it is where the air hoses hook to, and what they hook to is the throttle body, and the throttle body is hooked to the intake manifold.

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Wednesday, January 9th, 2008 AT 9:12 AM

SIMERY13