300TE 4MATIC (124.290) L6-3.0L (103.985) (1991)
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Drive Belt: Specifications
Belt Tension Data
On the 190E 2.3L, 420SEL, and 560SEC, SEL & SL models, A/C compressor belt tension is 110 lbs on new belts, and 88-99 lbs. on used belts. On all
other models, the belt tension is maintained by an automatic belt tensioner.
