The early M102 engines had some engine problems related to timing chain stretch. However with modified oil spray nozzle installed on upto 1988 engines the timing chain shouldn't be a problem.
The 1991 & later engines were redesigned with most engine parts being modified!
ON 1988 & later M102 engines with DOUBLE row timing chain the only weakness is the head gasket. LACK of coolant flushes will allow the gasket to deteriorate and let oil & water mix at the # 4 cylinder.
MERCEDES Benz Master Guild Technician (6 TIMES)
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190E 2.3 16V ITS SCCA race car (sold)
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