Dear All

New to the site but have had my Volvo S60 D5 SE (185) - 48,000 Miles July 2005 for approx 1 year now. Couple of weeks ago, just before I was booking it in for its annual service, I noticed that the engine was not getting up to temperature properly (Temp Gauge used to get up to the middle and stay there -even in heavy traffic). The Temp Gauge is only registering either the first or second mark (And a little higher in heavy traffic). Coupled to this I got a warning on the dash "Soot Filter Full - See Manual" which was followed afetr approx 20 miles by "Engine System Service Required" and a huge drop in power (Some type of limp home mode I suspect).
Anyway, went in to service (Still under Warranty thank goodness) and they found oil in the coolant. I immediately thought Head Gasket but they said it was the Oil Cooler. I also said that I thought the thermostat may need changing (Obvious I thought with the funny temperatures) After two weeks with Kennys Volvo in Galway, Ireland I had the car back. I noticed the temperature was still not right but as they had told me the problems had been fixed, I carried on as normal. Then approx 200 miles later faults reappeared (Soot Filter and Engine System).
Booked it back into Volvo again telling them to change the thermostat.
Got it back the next day - Errors cleared, Software updated and supposidly OK now.
Again after approx 100 miles errors have reappeared. It is booked in on Monday for them to have another go at it but I'm sure they havnt got a clue what the problem is.
From reading the manual, the soot filter regenerates itself every now and again whe at full engine operating temperature. If my S60 never get to full temp, its obviously not regenerating and hence filling the filter. A full filter then leads to the Engine warning.

Any help/Ideas on this would be greatly appreciated as I have no real confidence in the volvo dealer (Who wont even give me a courtesy car when mine is in).

Anyway, sorry about the length of the post but just wanted to air all the details.

Many thanks in advance

Andrew