We have experience with a variety of diesel swaps in Mercedes and non-Mercedes vehicles, including:
OEM Mercedes Swaps, in which the original motor is replaced with the same motor, are fairly straightforward and are usually 20-35 hours of labor and about $300-$500 in additional parts.
Mercedes Conversions, in which the original motor is replaced with a different Mercedes motor, are slightly more complicated and are usually 30-50 hours of labor and about $1500-$3000 in additional parts.
Non-Mercedes Conversions, in which the motor in a non-Mercedes is replaced with a Mercedes motor, are slightly more complicated and are usually 30-50 hours of labor and about $1500-$3000 in additional parts.

Our current shop rate is only $90/hr—compare at about $120/hr in most major cities.