att all s class owners

zerocool

Active Member
Joined
Dec 29, 2002
Messages
230
Location
uk
Car
vr6 rallye
there is a recall out which is affecting s class mercs regarding the drainage hole on the heaterbox situated in the engine bay.
if you open your bonnet and look in the right hand corner of the engine bay,you should see a plastic grill/mesh cover about the size of a ice cream tub lid.
this is the air intake for the heater motor,if you carefully remove this mesh you should see a rubber bellow which allows water build up to drain out,very often leaves and mud seen to accumilate here blocking up the rubber bellow,thus not allowing water to drain out and causing water ingress into the cabin and causing all sorts of wiring problems.

to cure this all you have to is remove the bellow and cut the end back about 5mm so the opening is larger,whilst your in there remove any build up of dirt etc that might case a blockage.
only takes 5 mins to check,more often than not you could find the box 3 inches deep in water.
your car may already have had the recall at pdi,but its worth checking anyway.
 

Tan

MB Enthusiast
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Joined
Oct 2, 2002
Messages
2,900
Location
Woodford Green
Car
W140 S-Class, Porsche Cayenne and Porsche Boxster
Which series of S-class does this effect? Is it the current model or previous?
 
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Z

zerocool

Active Member
Joined
Dec 29, 2002
Messages
230
Location
uk
Car
vr6 rallye
current model
 

psteels

New Member
Joined
Aug 8, 2003
Messages
1
Location
St. Albans
Car
1999 s320
I had this happen to my s class......I have also had all sorts of problems with CD player, telephone and brakes...are you aware of any other known problems?:mad:
 

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