Car is going in to have the heater matrix replaced (as it now appears the culprate for my heater problems). They want to run a diagnostic check before they start any work to check for faults.
Should i tell them the car has been remapped, as i don't want them to wipe the map and have to get it done again.
Should i tell them the car has been remapped, as i don't want them to wipe the map and have to get it done again.