its replace only.
you still get heat out of the footwell vents even though the electric elements are not working, after all the D3 only has them if you have the rear climate controls. All the other models make do with the usual arrangement. The heaters only add a small amount of heat, and as others have posted in the past finding a D3 with them still working is very rare. Neither of mine work, and I've not had comments from rear seat passengers when I have them. If the lower vents are cold then its possibly a stuck flap motor rather than the heaters causing issues.
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Manny
2004 A4 1.8T Sport Cabriolet, 89K Miles
Past
2004 D3 A8 3.7 Quattro, Xenon, Bose, Blinds, Solar Sunroof, TV, ACC, phone and almost every option. 168K miles rising slowly
with retrofit AMI and DVB-T in place of Analogue
2003 Volvo S60 D5 SE Manual, 197K miles.
2001 D2 A8 3.7 QS, Bi-Xenon, Bose, Blinds, Electric Everything, retrofitted RNS-D, 191K Miles
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