I have seen many times where the fan support bearing, or the alternator will fail and cause extreeme noise. Have this fixed soooon!!!!! It will fail and cause much damage. Ie Radiator and all (big$$$$$if not done soon))

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Benzmac:
1981 280GE SWB
1987 16V
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM