Hi Nathan,
That sounds like a fair price. MB calls the car a W220 and there is a forum devoted to those, look under the sedans section. I have a 2001 E-Class and I was able to upgrade the phone using the MB BT adapter (puck) but I still use the original NAV. Yours uses CDs but the newer ones use DVDs which I've read are better. I don't know how difficult that upgrade would be. There are a couple of forum sponsors who usually sell parts for less than the dealers. There is a sponsor section here that lists them. Please use the User CP at the top to fill in your location as it is quite helpful to know where you are.
Welcome to the forum.
That sounds like a fair price. MB calls the car a W220 and there is a forum devoted to those, look under the sedans section. I have a 2001 E-Class and I was able to upgrade the phone using the MB BT adapter (puck) but I still use the original NAV. Yours uses CDs but the newer ones use DVDs which I've read are better. I don't know how difficult that upgrade would be. There are a couple of forum sponsors who usually sell parts for less than the dealers. There is a sponsor section here that lists them. Please use the User CP at the top to fill in your location as it is quite helpful to know where you are.
Welcome to the forum.