Evaporator, removing and installing

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Remove air conditioner → Heating and A/C unit, removing and installing .
Remove air conditioner wiring harness from air guide → Heating and A/C unit .
Remove bracket and cover for coolant lines to heater core and remove heater core with coolant lines → Heating elements and air guides, removing and installing .
Remove bracket for refrigerant lines and disconnect air guide from air distributor housing → Heating and A/C unit, disassembling and assembling .

Dismantle air conditioner and remove evaporator from air guide at bottom.

NOTE:

Before installing evaporator, check and if necessary clean evaporator.

Fig 1: Installing Seal To Evaporator

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Install seal - A - to evaporator - B -.

Fig 2: Identifying Evaporator, Air Guide & Seal

Courtesy of VOLKSWAGEN UNITED STATES, INC.

When inserting evaporator - B - in air guide - C -, take care not to alter position of seal - A -. If applicable, moisten seal - A - with a suitable lubricant (e.g. soap solution).
After assembling air guide - C - and air distributor housing, check correct positioning of seal - A - at the opening for the two refrigerant lines.
The evaporator removed contains refrigerant oil which has to be returned to the refrigerant circuit → Refrigerant R134a/Refrigerant Oil Capacities and Specifications
Check type of seal at connections and refrigerant lines (must be designed for same type of seal) → Connections of refrigerant lines to the components (different versions)