R 350 4MATIC (251.165) V6-3.5L (272.967) (2006)
Housing Assembly HVAC: All Technical Service Bulletins
A/C - Water Leaks Into The Interior
Date: October 2, 2006
Order No.: T-B-83.10/80a
Supersedes: T-B-83.10/80 dated August 30, 2006
Group: 83
Revision History
Revision
Date
Purpose
a
10/2/06
Applicable Models Updated
-
01/07/06
Initial issue
SUBJECT:
Model 164.175/177/186/871
Model 251.165/175/177
Water Leakage from the Climate Unit
If you receive customer reports in the above model vehicles of tree debris collecting in the cowl area or water ingress into the interior of the vehicle due
to the climate unit overflowing, the drain valve in the bottom of the climate system air intake should be removed. In heavy rain, the water in the air intake
housing may not drain due to the drain valve being blocked with debris. This is more common with vehicles that are parked under trees which shed small
leaves, needles etc. (Figure 1).
Procedure
1.
Open engine hood.
2.
Remove climate system air intake cover by releasing the two clips and pulling up.
3.
Remove the drain valve (star shaped grommet) from the bottom of the climate unit (Figure 2)
4.
Reinstall air intake cover.
NOTE:
Be careful to not pinch any wiring harness or lines in the way when re-installing the cover.