Thanks All......
The guy that sold her this car seemed like a decent fellow tbh , but did say you need to check the water/coolant and oil on a weekly basis, is this normal for these types of cars or do you think he would have known about this issue by saying this ?
I own a is300h f-sport 2015 myself & tbh i never check anything apart from tyre pressures & when it needs it service it gets it.
thanks in advance guys just trying to get to the bottom of the issue for the sister.
Wayne