How can I resolve a coolant leak that occurs when I remove the radiator cap?

1996 MERCEDES BENZ S320
138,000 MILES
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KEN VICKERS
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I have a 1996 Mercedes S320 with a coolant leak. It leaks when I remove the radiator cap and stops after it's replaced. It appears to be leaking between the block and a unit mounted to the block just below the water pump. Can you tell me what that unit is and how I can resolve the problem?
Feb 3, 2012 at 7:09 AM
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RIVERMIKERAT
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The only thing I can think of below the water pump is the oil pan. The water pump has a weep hole on the bottom. This is probably where the leak is coming from. A small amount of seepage is normal, but when the pump begins to fail, it will begin to leak.
Feb 3, 2012 at 7:26 AM
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RUSS PITTMAN
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Like the dingling guy here told me 'your owners manual will tell you'. sheesh!!
May 14, 2012 at 2:04 AM
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RIVERMIKERAT
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The owner manual has a huge amount of information in it. Especially about certain systems unique to your vehicle.
May 14, 2012 at 4:07 AM