13000 kms on clock. 03/2005 280 Cdi After cruising on Autovia at 120kph for 30 mins or so instrument cluster turned red and displayed message Oil Level Warning - Reduce oil level. Slowed to 100 kph and after 3 mins it changed to normal. 30 mins later same again. When at red shows 1 malfunction - this fault goes when display changes to normal colour. Change the cluster display and it also cancels the red and he malfunction event. Fine for normal usage then it happens again but only when doing prolonged higher cruising speeds. Tried to check the oil level but the only thing that looks like a dipstick (apart from me) has a black plastic cover saying "MB technico only" to the rear of engine and bulkhead with bits of wire attached to it. Far too complicated when you are used to Ford Model T. type machinery or is this a Mercedes "built-in heart check" device" ! Really must get an Owners Manual for this car but not available here in English - any ideas where they can be obtained in UK? Any ideas or advice would be appreciated.