It seems a very bizarre move to just destroy the service history rather than simply redacting personal information
If you're selling a vehicle and you
don't redact the information yourself then I would consider that consent to pass your information on to subsequent owners for the purpose of maintaining the vehicle.
If a dealer (or indeed subsequent owner) misuses that information, for example sends you unsolicited marketing information based on what they found in the vehicle documentation, then thats a breach of the original purpose of the information so they become liable for that breach.