Reminds me of when my then-new '98 (or was it '99?) Audi A4 cluster partially crapped out on the highway. The needles dropped to zero and several warning lights came on, but the car still drove normally.

I pulled over and called the dealer service department for advice, and we decided it was safe (for the car) to continue my journey. But with the partial instrumentation failure, the air-conditioning also refused to operate, so I had a sweaty summertime trip.