If the engine pointer hasn't been moved a dozen times to do front crank seals, then with v/cover removed; align cam marks & look at the crankshaft. If the crank is more than 3deg off then it's time for new chain!!! While you are there, check the valve adjustment too.
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MERCEDES Benz Master Guild Technician (6 TIMES)
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44 years foreign automotive repair
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190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
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