Newbie, here

I've done a brief scan and search of previous message topics, but did not see anything on my subject. Please forgive if this has been dealt with before.
I'm planning to get a E320 4matic wagon soon, but wanted to raise it a little (maybe an inch or two at the most) so it would be capable of handling even very bad roads. These and other related mods (larger rolling dia. wheel/tire combos) will entail some real expertise to do right.
I thought maybe someone knew of a resource that has expertise in this sort of conversion, perhaps a MB rally racing shop.
Thanks in advance. Any advice is welcome.