Hi all, new to this forum!

A strange problem. I fear my ecu is kaput. Took car in for service and change of cambelt/water pump. Car worked well afterwards for about a week, just odd random 'Engine fault' message flickering very briefly at start which stopped completely after about 100miles travel never to reappear.

However after a week, a message something like 'Car security error' appeared. Reinserted key, waited a few mins and ok. Drove off. When stopped car and tried to start same msg, managed to restart. Then stopped car, tried to restart and would not. Whole lot of random messages, ASB, ASR failure, ebu failure, loose connection. Called recovery service who took connection off ecu to reveal a lot of globs of fluid which looks like antifreeze under the connector, which is protected by a very substantial gasket. Is there any way antifreeze can get there apart from negigence? Trying to get garage to admit it's their fault is I fear an uphill struggle. Would ecu be taken off to change cambelt and could antifreeze then get into ecu when topping up (course it could if top is off and they changed antifreeze with top off,) but would that be a likely scenario? Has anyone had this problem before? Would this cause the fault? Would cleaning the connector help (how to do that without causing further damage I do not know!)?
Any help would be much appreciated.

Hi. Welcome to the FF.

Scrape out as much of it as you can with a small (watchmaker's) screwdriver without damaging the pins, then clean the connector with electrical contact cleaner (not WD40) and a denture brush.
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Thanks, I'll give that a try.

Antifreeze has a particular smell, try to sniff the ECU pins and compare with smell of coolant deposit. Could be moisture or something else. It´s required remove ECU to change a belt and water pump in your Stilo?. Outside of ECU has spot of coolant too?