Ebay has multiple sources for most things new or used; also check Amazon. With ebay, search r230 trunk strut 2003(or your year). It will also let you enter your vehicle make model and year.Dealer found that it was a abc pump on the driver side that had the pressure was going on and off.
How about being able to tell if the trunk struts have been leaking. Right now the trunk lid will not stay up. Is there an adjustment that I could make or do they need to be replaced, Watched youtube video and it appears easy to replace.
If I need a replacement is there a cheaper place to buy parts than going to the dealer.