The data indicates that nearly all Mercedes-Benz CLK (1997-03) CLK230K 2DR Cabriolet 2.3 Avantgarde Tip Auto models are equipped with a 2.3-litre petrol engine, accounting for 100% of the vehicles. The primary fuel source for these vehicles is overwhelmingly petrol, used in 98.6% of cases. A small proportion, 0.7%, are bi-fuel or diesel variants, suggesting that petrol engines are predominantly standard for this model. This highlights the model's strong association with petrol powertrains and limited variation in engine capacity.