W124 1990 300CE has a dripping or ticking sound that I hear in the interior when the radio is off. Is this a normal sound or?? It seems to be going on when the engine is cold or hot.

Thanks in advance.

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Norm K.
'97 E420 Sport
'06 E350 Sedan
'67 Mustang Coupe
'70 F-250
'15 VW Jetta