Question about Mercedes-Benz 300-Class
I can not find where to adjust the serpentine belt on my 1987 300e mercedes
Look for a hole you can fit the square end of a ratchet in. Should be a 3\8 or 1\2 inch drive. Or it's a pulley with a spring in it. It will look like it's on a lever type thingy. Just put a wrench on the bolt in the middle of the pulley turn to the left, bolt turns, wrong one, pulley moves, right one. Don't forget to take a pic of the belt so you know how to put it back on.
Posted on Apr 23, 2009
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Posted on Jan 02, 2017
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2.8L and 3.1L Air Pump Belt
Fig. Fig. 6: Unfasten the retaining bolts...
Fig. Fig. 7: ... then remove the serpentine belt guard
Fig. Fig. 8: ...
Fig. Fig. 9: ... then remove the serpentine belt
Fig. Fig. 10: Serpentine drive belt routing-2.2L engine
Fig. Fig. 11: Removal and installation of the serpentine belt-2.3L engine
Fig. Fig. 12: Serpentine belt routing-2.5L engine with and without A/C
Fig. Fig. 13: Use an 18mm box end wrench on the pulley nut to rotate the tensioner on the 3.8L engine
Fig. Fig. 14: in. breaker bar to rotate the tensioner
Fig. Fig. 15: On the 3.4L, use a box end wrench, then rotate the tensioner clockwise and remove the serpentine belt
Remove the belt guard or coolant recovery reservoir as required.
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