Headed back to New
AO Silver Member
Join Date: Feb 2005
Location: United States
County: Armed Forces Europe
The central locking behavior you mention is exactly the same as in my car, and I have no alarm. So I'd say, your 155 doesn't have one either.
When you say the oil level light comes on for a few seconds, how long exactly? Mine comes on as well on ignition, but I wouldn't think it stays on for more than 2 secs. I'll try to remember to check that tonight.
Same behavior for both rear doors on my car, I just spray some WD-40 every 4-6 months. The door handles tend to be noisy after a bit as well, same treatment.
Hope this helps,