Mercedes Benz repair: Heater core, detali, mb2

Question
Forgot car Data: 1984 500 SEL  heater core R/R.. no shop manual. ? was can I replace, or job better left for pro?

Answer
Climate Control:
http://www.mercedesshop.com/shopforum/showthread.php?t=142408

http://www.detali.ru/cat/oem_mb2.asp?TP=1&F=126037%5F287&M=117%2E961%2C963&GA=72...

http://www.detali.ru/cat/oem_mb2.asp?TP=1&F=126037%5F287&M=117%2E961%2C963&GA=72...

http://www.detali.ru/cat/oem_mb2.asp?TP=1&F=126037%5F287&M=117%2E961%2C963&GA=72...

http://www.detali.ru/cat/oem_mb2.asp?TP=1&F=126037%5F287&M=117%2E961%2C963&GA=72...

http://www.detali.ru/cat/oem_mb2.asp?TP=1&F=126037%5F287&M=117%2E961%2C963&GA=72...