Capacities for Audi A6 (4B_) from 1998 and Audi Allroad: Notes

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Characteristics of refrigerant circuit:

Restrictor

Reservoir

"Denso" or "Zexel" compressor → 87 - Air conditioning and → Electronic Parts Catalog ETKA

Vehicle model	Production period	Capacity in grams	Differing characteristics of this refrigerant circuit
Audi A6	From 04.97 to 11.97	800 + 50	Restrictor not colored Air conditioner unit version 1 Heating, Ventilation and Air Conditioning 87 Refrigerant System, Servicing Condenser with flat tube dimensions 20 mm x 3 mm
	From 11.97 to 08.98	850 + 50	Restrictor colored (yellow) Air conditioner unit version 1 Heating, Ventilation and Air Conditioning 87 Refrigerant System, Servicing Condenser with flat tube dimensions 20 mm x 3 mm

NOTE:

Restrictors with a modified hole have been installed at the factory since November 1997 (yellow colored). The capacity was increased by 50 g for vehicles in which a yellow colored restrictor was installed.
In order to distinguish between the two restrictor versions, the one with the smaller hole (1.54 mm) is yellow colored. The restrictor with the larger hole (1.83 mm) is not colored.
If a vehicle is equipped with a colored restrictor as replacement for a non-colored restrictor, add 50 g more refrigerant (see table). In addition, the capacity specified on the label in the vehicle is to be checked and amended if necessary or the existing label is to be replaced with one indicating the correct capacity (affix over old label).
The Audi A6 is equipped with different compressors depending on the engine and production period.
Production was gradually switched in August/September 1998 from air conditioner unit version "1" to air conditioner unit version "2". A reduction in capacity was achieved as the evaporator was also modified together with the air conditioner unit.
The two air conditioner unit versions can be identified on the basis of certain characteristics described in the vehicle-specific → 87 - Air conditioning and → Electronic Parts Catalog ETKA.

Vehicle model	Production period	Capacity in grams	Differing characteristics of this refrigerant circuit
Audi A6 With 4-cyl. engine With 6-cyl. gasoline engine	From 08.98 to 04.99	750 + 50	Restrictor colored (yellow) Air conditioner unit version 2 Heating, Ventilation and Air Conditioning 87 Refrigerant System, Servicing Condenser with part no. 4B0 260 401 (403) and index D , E or F (flat tube dimensions 20 mm x 3 mm ) Electronic Parts Catalog ETKA
Audi A6 With 6-cyl. diesel engine	From 08.98 to 10.98 From 12.98 to 10.99 (see notes)	750 + 50	Restrictor colored (yellow) Air conditioner unit version 2 Heating, Ventilation and Air Conditioning 87 Refrigerant System, Servicing Condenser with part no. 4B0 260 401 (403) and index D , E or F (flat tube dimensions 20 mm x 3 mm ) Electronic Parts Catalog ETKA

Vehicle model	Production period	Capacity in grams	Differing characteristics of this refrigerant circuit
Audi A6/Audi Allroad With 6-cyl. diesel engine	From 10.98 to 12.98 10.99 on (see notes)	550 + 50	Restrictor colored (yellow) Air conditioner unit version 2 or 3 Heating, Ventilation and Air Conditioning 87 Refrigerant System, Servicing Condenser with part no. 4B0 260 401 (403) and index G or R (flat tube dimensions 16 mm x 1.7 mm ) and Electronic Parts Catalog ETKA
Audi A6/Audi Allroad With 4-cyl. engine except 2.0 l With 6-cyl. gasoline engine except 3.0 l engine With 6-cyl. diesel engine (see notes)	04.99 on	650 + 50	Restrictor colored (yellow) Air conditioner unit version 2 or 3 Heating, Ventilation and Air Conditioning 87 Refrigerant System, Servicing Condenser with part no. 4B0 260 401(403) and index H , J , K , S , T or N (flat tube dimensions 18 mm x 1.7 mm ) and Electronic Parts Catalog ETKA
Audi A6 With 4-cyl. engine 2.0 l With 6-cyl. engine 3.0 l	05.01 on	550 + 50	Restrictor colored (yellow) Air conditioner unit version 3 Heating, Ventilation and Air Conditioning 87 Refrigerant System, Servicing Condenser with part no. 8E0 260 401(403) and index A (flat tube dimensions 18 mm x 1.7 mm ) and Electronic Parts Catalog ETKA A/C Compressor Regulator Valve N280

NOTE:

Condensers with A/C Pressure Switch F129 or High Pressure Sensor G65 are supplied for factory use as part no. XXXXXX 401 X. This condenser is supplied without A/C Pressure Switch F129 or High Pressure Sensor G65 for replacement purposes as part no. XXXXXX 403 X.
From 10.98 to 12.98 vehicles with 6-cyl. diesel engine (initially about 10000) were equipped with condensers of a different design. The capacity is different for vehicles with these condensers. The condensers can be identified on the basis of certain characteristics and the part number → Flat tube dimensions of condenser .
The Audi A6 is equipped with different compressors depending on the engine and production period.
On condenser replacement, pay attention to index of part number (different flat tube versions, flat tube dimensions 16 mm x 1.7 mm, 18 mm x 1.7 mm or 20 mm x 3 mm) and the different capacities involved. If a condenser with a different part number index is installed, the capacity specified on the label must be checked and amended if necessary or a label indicating the modified capacity must be affixed over the existing label. The part number can be found on a sticker attached to the bottom of the condenser.
As of 04.99, production was gradually switched from condensers with flat tube dimensions 20 mm x 3 mm to condensers with flat tube dimensions 18 mm x 1.7 mm or 16 mm x 1.7 mm. The change in production took place gradually during the course of 1999 depending on the engine and existing supplies of the different versions. Refer to Parts List for precise assignment of the different condensers → Electronic Parts Catalog ETKA.
Vehicles as of 04.99 with 6-cyl. diesel engine may be equipped with a condenser with index "D" , "G" , "R" or "K". Pay attention to the different capacities → 87 - Air conditioning and → Electronic Parts Catalog ETKA.

Vehicle model	Production period	Capacity in grams	Differing characteristics of this refrigerant circuit
Audi A6 With 8-cyl. engine	Up to 03.99 and As of 02.00	550 + 50	Restrictor colored (yellow) Air conditioner unit version 2 or 3 Heating, Ventilation and Air Conditioning 87 Refrigerant System, Servicing Condenser with part no. 4B3 260 401 (403) B, D, E (flat tube dimensions 18 mm x 1.7 mm ) Electronic Parts Catalog ETKA
Audi A6 With 8-cyl. engine	From 03.99 to 02.00	650 + 50	Restrictor colored (yellow) Air conditioner unit version 2 Heating, Ventilation and Air Conditioning 87 Refrigerant System, Servicing Condenser with part no. 4B3 260 401 (403) C (flat tube dimensions 18 mm x 1.7 mm ) Electronic Parts Catalog ETKA

NOTE:

The Audi A6 with 8-cyl. engine is equipped with a "Denso" compressor.
Production was gradually switched in August/ September 1998 from air conditioner unit version "1" to air conditioner unit version "2". Vehicles with 8-cyl. engine are only equipped with air conditioner unit as of version "2".
The different air conditioner unit versions can be identified on the basis of certain characteristics described in the → 87 - Air conditioning .
Different condensers were installed in vehicles with 8-cylinder engines. Exclusive use was made for USA vehicles of condensers with part no. 4B3 260 401 (403) C, D, E.
In March 1999, production was gradually switched from condensers with part no. 4B3 260 401 (403) B to condensers with part no. 4B3 260 401 (403) C.
If the condenser installed is replaced by one with a different part no., amend capacity specified on label or affix label with modified capacity over existing label. The part number can be found on a sticker attached to the bottom of the condenser → 87 - Air conditioning and → Electronic Parts Catalog ETKA.