Ahoy, mate! Regarding the Set Solenoids 6PCS 722.6 Transmission Solenoids Kit, I apologize, as I currently can't confirm if it is compatible with your 1999 Mercedes Benz E280. However, I did find some other useful products that may pique your interest! For instance, the Replacement Steering Switch for Mercedes Benz Trucks is available for R959, perfect if you're steering towards new controls. Additionally, the Auto Transmission Filter + Oil Pan Gasket + Plug Adapter for Mercedes Benz is available for R499, which could be a handy addition if you're servicing your transmission system. Let me know if you need anything else, and happy shopping! ??
