Originally Posted by carson356

which dealer?
official mercedes guide i have gives time as .8 hrs, little over 30 minutes

which includes job description below

83-X012
+ 83-XXX
-

83 2902 +INCLUDES:

ENG. COOLANT, DRAIN AS NEC. / REFILL
VALVE, R & R
REPAIR, CHECK FOR COOLANT LEAK(S)
VALVE FUNCTION, CHECK AFTER REPAIR

<202 MODEL INCLUDEADDITIONALLY:

BRACKET WITH CONTROL MODULES, R & R

+DOES NOT INCLUDE:

DISCONNECTED HEATER HOSES, REPLACE