Probably an old question but please give some advice:
I have a 1998 E300D....now 5 years.....original battery which is in good shape....all cells read in the green with a hydrometer.
Should I replace the battery now only because of its age, and not look for a sudden dead battery in the near future? I thought 5 years is on the old side for a battery and probably not much life is left that can be counted on. Any advice please.......and should I ultimately make the replacement the OE Varta or should I go for a Diehard or an Interstate? Thank you.....