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Hello I got a 300d and there is a strange sound coming from front of the engine. Doesn't sound like it's in engine but pulleys or maybe timing chain area? Any ideas or suggestions? Car has 250,000 miles.
 

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1984 300D
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Use a mechanics stethoscope or a piece of broom stick or large screwdriver and carefully place one end on the engine area you want to listen to and your ear on the other end and see if you can locate where the sound is coming from. Of course avoid moving or hot parts.

My worry would be that your Vacuum Pump is having issues. If the arm on the inside or the bearing comes apart it often falls into the timing chain and sometimes cause your valves to make contact with the Pistons.
 
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