WHAT IS THE APPROXIMATE LIFE OF TIMING CHAIN IN 2.5 DIESEL IN 1986 190D. ALSO IS THEIR ANY ADJUSTMENT THAT CAN BE MADE TO SERPENTINE BELT TENSIONER AND HOW TO RELEASE FOR BELT REPLACEMENT? THANKS FOR SHARING THE INFO! THIS IS A GREAT PLACE TO LEARN ABOUT MERCEDES BENZ.

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BRAD FRANCIS
1986 190D 160,000 mi.
SUMNER, TX