Thanks for the response. I've asked the dealer about this and the car I'm looking at had the replacement done. What im wondering now is if anyone knows after the replacement has anyone had any more issues with it, will I have to get them done again down the road or any other issues resulting from this? Ive done some digging around and cant seem to find anything about post replaced cylinder heads. (Also should I steer clear from this vehicle? 2020 Mercedes A35 with 22,0000 Kilometers)69 Plate in the UK simply means that the car was registered between September 2019 and February 2020. Has nothing to do with when the car was built. If the car was built and took a while to sell, it could easily be registered on a 2020 plate.