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Q: no start no compression left bank ,timing chain&valvetrain ok on 1990 Mercedes-Benz 560SEL

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1988 560sel,no start, no compression left bank,right bank ok,timing chain and valve train operation ok,squirted oil in cyclinders leftbank side compression comes back,reinstall plugs & plugwires vehicle tries to start but does not,cyclinder leak test found no leaks
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If you squirt oil and there is compression, then there has to be leakage around the rings, which may not show up in a leak down test. Any time you have no compression, it has to be a mechanical issue, such as a bad head gasket, bad rings etc. Even if the timing chain was off, you would still get a little compression.
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