Steam in passenger side and water coming out under battery

[Wenzil]

Hi All

Got home from a good drive to find quite a lot of water coming out under the car from battery area and whiffs of steam and water leaking in passenger dash area. Is this defo heater matrix or could it just be coolant venting/airlock/overfill, it has just had a new replacement rad although has done 3 good trips since

Its a Mk2 with aircon if that makes any difference. Thoughts and advice appreciated

[Wenzil]

Thanks guys, pleasantly surprised to find matrix available and very reasonably priced.
Is it difficult to change or should I just give it to the specialists

[Wenzil]

Thanks for that Nick. I know they are awkward to vent, wondering if this is what caused the problem in the first place as I had a rad leak on the way back from Spain and had recently had it changed. Anyway Matrix ordered so should be sorted soon