[C230Kto380SL]

Problem: Battery may explode (there was a recall issued for this)
Cause: Excessive gas emissions from battery
Solution: Owner to check electrolyte levels regularly.
Note: Mine blew up two weeks after the car was serviced by the dealer under the recall notice ('99 C230K).

Problem: Occasional very Hard downshift from 2nd to 1st at low speed (5mph or so)
Cause: Unkown ( dealer could not duplicate)
Solution: None. Live with it.