Can anyone tell me where i can purchase a reliable diagnostic tester that will fit my car and show faults and clear codes please, and the location of the diagnostic plug thank you.
2000 Mercedes C240 Elegance (W202) with Multipoint Romano LPG Injection System
You will need Star Diagnostics software ....which is expensive or Carsoft...which is what I use. Not sure where your OBD plug is but try looking under the dash drivers side above the foot pedals...assuming it is a 16 pin OBD otherwise if it is the 38 pin socket then it will be under the bonnet.
If you are near Cardiff give me a shout and I will put mine on it for you.
As CKLClive said its under the round cover passenger side with a lightning bolt symbol on it. Its a 38 pin connector but i bought an adaptor from Amazon which converts it to a 16 pin obd for about 6 quid. I bought my code reader from Argos and it works great on my car.