Buddychops
New Member
- Joined
- Jul 31, 2015
- Messages
- 2
- Reaction score
- 0
- Location
- Suffolk
- Website
- www.barrysmithcars.co.uk
- Your Mercedes
- ML 270 cdi 2002
We have a ML270 cdi, which we've had for about two years. It has done 189k and has been running really well up until about a month ago.
The previous owner had kept it regularly serviced and we have since we've had it. I am a classic car restorer, so know my way around cars to a certain degree. However, obviously, something built in 1935 is a world away from what's under the bonnet of our ML270.
It starts up ok and runs good on tick over. We drive it out and, providing we don't drive excessively fast (keep it to a steady 60-65 mph), don't race the engine (keep the revs to 2000), it drives ok. But if we are on small roads, where we have to change speeds, go up and down inclines, she's not happy. She'll start to splutter at traffic lights, with very poor tick over and has cut out several times, when we are driving it. No warning lights come up. We restart the car and it drives off fine. Sometimes when we get the splutter, we get a puff of black smoke, but nothing excessive.
We have replaced the mass air sensor valve (genuine mb), we've checked the pipe to the turbo that there are no splits. We have cleaned valves, replaced the air filter. It's got us totally baffled.
We had it put on a fault finder and were told it was the mass air sensor, so a second one was fitted, which actually made the car worse, so we removed it and put the original back on. So now we have three mass air sensors - the original (on the car) and the two we've purchased. Any ideas or suggestions, much appreciated.
The previous owner had kept it regularly serviced and we have since we've had it. I am a classic car restorer, so know my way around cars to a certain degree. However, obviously, something built in 1935 is a world away from what's under the bonnet of our ML270.
It starts up ok and runs good on tick over. We drive it out and, providing we don't drive excessively fast (keep it to a steady 60-65 mph), don't race the engine (keep the revs to 2000), it drives ok. But if we are on small roads, where we have to change speeds, go up and down inclines, she's not happy. She'll start to splutter at traffic lights, with very poor tick over and has cut out several times, when we are driving it. No warning lights come up. We restart the car and it drives off fine. Sometimes when we get the splutter, we get a puff of black smoke, but nothing excessive.
We have replaced the mass air sensor valve (genuine mb), we've checked the pipe to the turbo that there are no splits. We have cleaned valves, replaced the air filter. It's got us totally baffled.
We had it put on a fault finder and were told it was the mass air sensor, so a second one was fitted, which actually made the car worse, so we removed it and put the original back on. So now we have three mass air sensors - the original (on the car) and the two we've purchased. Any ideas or suggestions, much appreciated.
