I believe I have a sticking lifter on my 300CE. When I start the car cold I don't hear anything but as soon as I accelerate I can hear a faint ticking noise until the car start to warm up. In the warmer months it is not as noticeable. I put a bit of Seafoam into the crankcase right before my last oil change and that didn't seem to help at all. I change the oil frequently, usually every 3-4 k miles and I'm using Mobil 1 0W-40 with Mahle or Mann filter. How can I determine which lifter is sticking? I'm assuming it is an easy fix to swap in a new one on the M103?

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1989 300CE