Went out to my newly acquired C30 a couple of days ago to find the driveway wet with coolant after it had been parked for an hour or so, checked the expansion tank and it was empty. Topped it up temporarily with tap water and am going to flush and refill today with coolant. I have heard these tanks weaken with age. I suspect it me have a crack that opened up with the many short trips I did in traffic and high air temps that paericlar day. Have been monitoring it over the past 2 days and its fine.
I intend to replace the tank regardless. Are there good after market jobbies out there? Or do I need to venture into a stealership??