If you were to buy a W203, ensure all electrics work as they should and check whether the SAM module has been replaced. Overall, the W203 does have issues like any other Mercedes however they are mainly due to electrics rather than mechanical issues. Engine May Revert To Limp Home Mode (DPF Related).Many good image inspirations on our internet are the best image selection for Mercedes C240 Engine Diagram. We collect lots of pictures about Mercedes C240 Engine Diagram. Mercedes Benz W203 Water Pump Replacement 2001 2007 C230 C280. Rear Seat Belts May Not Engage Correctly Home » Wiring Diagrams » Mercedes C240 Engine Diagram.
Has your W203 not got xenon lights? You can use the H7 bulbs to produces a great xenon look and increase visibility on the roads with this full xenon headlight bulb kit. The W203 can be improved further, some great upgrades would come in the form of a rear reverse camera that be connected just above the bumper and be a cheaper option than going to the dealers. Balancing Shaft – Common in C320’s before 2003 (M272) where the rotating shaft developed cracks.More Common in the C180 Kompressor models. Oil in Engine Wiring Loom – occurs where the cylinder head oil leaks past the solenoid and ends up in the loom to the ECU, which can cause further issues with MAF/02 Sensors.Front Suspension Bushes – the W203’s eat bushes regularly and you will be able to tell by a clunky front end whilst going over bumps.A new module can be purchased at the dealer for over £200+. Symptoms can include: fuel gauge not working, lights not working, constant fuses blowing, key fob issues, battery can’t hold power (constant drain), rear lights staying on, dashboard buttons non respondent and even more. SAM (Signal Acquisition Module) Module – A faulty SAM can be a huge electrical headache.Valeo Radiators – Symptoms are a droning/humming noise at approximately 1200 – 2500 rpm as well as a jolt when accelerating gently.Rust – Although not as bad as the predecessor, the W203’s can suffer bad rust which usually hits the rear arches first.Common W203 Reliability Faults and Problems