it wont hurt the s/c but might take a while to go 600 miles! best place would be a ford dealership and get the ford lightning bosch pump. if not the johnson will most likely be ordered online. apeusa has them the cheapest. any mercedes dealer would have the part look for a slk32 intercooler pump. dont tell them its for a xfire on sunday you prolly wont find anything!

you could try posting on the c32 or e55 section of mbworld.org. asking for a pump. someone just might be in the new mexico area and be willing to help. most of them are really great folks and rush to help someone broke down