Other than calling the dealer, how can I confirm the correct coding plug part number for a particular vehicle. It's for a 91 300D. The amp is part number 005 545 05 32. I think the correct plug is 007 545 54 32 but just want to make sure.

I tried germanstar.net, but it doesn't seem to be in their system.

Trying to get cruise up and running on a car I'm selling.....

Thanks.

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 158k miles
06 E320 CDI "Rutherford", Black on Tan, 177k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 144k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 72k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife