Mechanic said there was corrosion but didn't tell specifics. What should I look out for and what areas would make it not worth purchasing the vehicle.

Car dumped all the fluid and will not reverse

I just got the car today and I am having some issues with the sunroof. Basically the buttons do not correspond at all with the correct actions. I have yet to successfully do anything but tilt and un tilt. I have never actually seen the sunroof retract. Even with the titling it was pretty random which buttons worked and were almost always wrong. I checked and replaced the two corresponding fuses just to be safe with no fix. I also tried turning the key a bunch of times in the drivers side which apparently resets stuff but that did not work either.

Just purchased a 2007 S40 2.0L diesel. I recently noticed that it's leaking oil. As I took the engine tray down to do an oil change since it's last one last April. I power washed the oil that was welded to the subframe before I left work to come home but when I got back I noticed it's leaking oil from the back of the engine, the flywheel seems to be wet from the oil. What would it be? The oil return pipe from the turbo? The oil filter housing O-ring is perished? Crankshaft seal is gone? The front of the engine doesn't have any oil in it not on the auxiliary belts. You can see up from underneath it at the back of the engine it's wet from oil.

I've had the left and right control arms replaced, as well as the front right strut. My mechanic has looked it over several times. He can't find an explanation for the noise. It occurs when I drive on slightly rough roads, at lower speeds (under 50 mph). It sounds like the whole car is going to fall apart, though I've been assured that it's ok.

It gives me a service alarm on the dash board even after my mechanic changed the startermotor and serviced it.Its just quite please help.acts
like something blocking the flow of fuel.

daughter lives out of area, car started to act up, added 2 quarts of oil, this brought oil level up, reports it is running fine

windows, or cental locking.

Repair was made to gear selector problem and drove the car a short distance and it went dead. It is showing a P0603 code - but I've been told this could be a failed starter control module?? HELP

While driving, happens more and more frequent (4 or 5 times today), if I shut of a/c for a few mins and turn back on it works like normal for a little while

Any idea what could be wrong with it? It's a 2007 Volvo s40.

problem for 1 year