So that's what it looks like! Like Gilly said, some of the older cars have belt-driven ones - I'm not sure if that means older 202s, or that after that 201 they became electric. Obviously your 96 is electric......and therefore independent of the belt.

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former: 83 300D, 97 C230, 93 400E

current: 08 C300 Luxury , 92 500SL