Mercedes-Benz SL320 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your Mercedes-Benz SL320
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Mercedes-Benz SL320 ProblemsRough running motor/lack of power due to failed ignition coil packs/spark plug resistors
Failed ignition coil packs or spark plug resistors can cause a rough running motor or lack of power.
A faulty mass air flow (MAF) sensor can cause erratic/rough engine operation and fuel economy issues. Since this sensor measures the actual amount of air entering the motor, when it fails, the engine control module (ECM) takes the wrong information and delivers incorrect volumes of fuel to the cylinders.
Internal and External engine oil & coolant leaks can develop from the head gasket and/or timing cover gasket; these leaks should be repaired before the engine oil and coolant intermix which can result in severe engine damage.