It is not needed. You can use the TPS in the non-ASR TB as well without issue. That said, it is not as accurate as other TPS so if you find that it is not getting the tip in you need, you might need to change to a different TB. I've used both the non-ASR tb and mad an adapter for an E36 TB. The latter gave me more control, the former was easier (and IIRC is a little bigger, 70mm vs 65mm)

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1993 190E 2.6 Sportline