1997 - R reg? Ah ha you're in the UK then. You'll find that most people here are in the states so saying R reg won't help!

Anyway all I can find from a quick search is that you have a 2.3 litre engine... which makes me think you've probably got an OM604 engine... which is related to the OM606 according to wikipedia

http://en.wikipedia.org/wiki/Mercedes-Benz_OM604_engine

Is it a four cylinder diesel engine?

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!