'01-E320 & 02-ST2
I'm not sure when it was redesigned. However, if it's not leaking, I'd be inclined to ignore it, just check it every so often to see if it's starting to leak. OTOH it's a cheap and easy enough repair, so if you're losing sleep over it, order the parts and take care of it. Autohausaz sells the port cover and gasket although shipping is likely to eat up any cost savings, at least if your dealers are only charging list for the parts. Alternatively you can order some other stuff (filters, wiper blades, idler pulley?, etc.) and get free shipping at $50.Is there a way (short of removing it) to identify whether you have the new style cover or the old one? Are there numbers or other marks on the outside of the cover to differentiate between new and old? I have a '99 E430.