A4 Cabriolet L4-1.8L Turbo (AMB) (2005)
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Thermostat Housing: All Technical Service Bulletins
Cooling System - Coolant Leaks/Poor Heater Output
19 Coolant leak or no heat in passenger compartment from HVAC
19 10 06
2009949/6
June 18, 2010
Supersedes Technical Service Bulletin Group 19 number 09-01 dated March 5, 2009 for reasons listed below.
Affected Vehicles
Condition
^ Customer concern of loss of coolant, but no leak in cooling system can be found.
^ Customer concern of no heat or noticeable drop in heat output in passenger compartment from HVAC system when engine at idle.
Technical Background
Both concerns may be caused by a coolant leak from plastic plug.
