I would begin by checking the car with a OBD scanner. Good $40 tool to have with a 15 yr old car. The LHM could just be a product of the engine issues or you could have a transmission problem too. Might as well start with the cheap stuff.

FYI - If you get a lot of stored/pending codes, clear them all and then drive for a couple of days before rescanning. What returns will be the relevant trouble codes.

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Good luck.






1998 E320 Wagon