jberks
Senior Member
- Joined
- May 12, 2004
- Messages
- 11,153
- Reaction score
- 41
- Your Mercedes
- Jaguar XF 3.0 S, LR Freelander 2, Fiat 500 & Fiat Panda
For mileage covered I don't think there are many problems. Yes you hear of issues but more often than not, the car in question has already performed faultlessly for 140,000 miles plus, so it's entitled to a bit of a weakness.
Mine is now up to 88,000 miles and has never missed a beat. The engine is sweet and no signs of wear. I fully expect another 80,000 miles without concern. Ok, I have replaced the odd sensor and pipe but I had similar faults on my old unstressed E240 so its not a diesel thing. Actually I had issues on my 240 that I wont see on my cdi (ignition related) and that was gone by 75,000 miles. This evening I will jump in, flick they key, the lights will come on as will the wipers, the aircon will heat and dehumidify as always and she will cruise the 50 miles home as effortlessly as she did on the way here, sitting happily at 50-80 and if I ask for a quick spurt to 100 it will happen instantaneously and at a rate few petrol cars could keep up with. I filled up on Sunday and the trip meter will read over 600 miles before I need to go back.
I don't think, unless I could afford to run a V8, I'd go back to petrol and even then, it would be a hard decision whether to have a thirsty 500 or a chipped 320cdi.
Modern cdis are used primarily for high mileages. Think of a modern taxi or rep mobile and it's obvious that reliability issues wouldn't be tolerated for long. But at the same time, with high fuel pressures, turbos and emmission issues, they are more complex and more stressed than their petrol equivalents, in which context their true reliability is actually very impressive.
Mine is now up to 88,000 miles and has never missed a beat. The engine is sweet and no signs of wear. I fully expect another 80,000 miles without concern. Ok, I have replaced the odd sensor and pipe but I had similar faults on my old unstressed E240 so its not a diesel thing. Actually I had issues on my 240 that I wont see on my cdi (ignition related) and that was gone by 75,000 miles. This evening I will jump in, flick they key, the lights will come on as will the wipers, the aircon will heat and dehumidify as always and she will cruise the 50 miles home as effortlessly as she did on the way here, sitting happily at 50-80 and if I ask for a quick spurt to 100 it will happen instantaneously and at a rate few petrol cars could keep up with. I filled up on Sunday and the trip meter will read over 600 miles before I need to go back.
I don't think, unless I could afford to run a V8, I'd go back to petrol and even then, it would be a hard decision whether to have a thirsty 500 or a chipped 320cdi.
Modern cdis are used primarily for high mileages. Think of a modern taxi or rep mobile and it's obvious that reliability issues wouldn't be tolerated for long. But at the same time, with high fuel pressures, turbos and emmission issues, they are more complex and more stressed than their petrol equivalents, in which context their true reliability is actually very impressive.