Maybe $1400 for factory parts. But you should be able to get a non-M-B condenser that fits for less than $200, and maybe add in some custom hoses, if needed. You could probably find a donor factory condenser from a junkyard for much less. Depending on age and time in the yard and moisture that may not be a desirable route, though.

If you can turn a wrench you should be able to replace a condenser.

$2800 is crazy talk.