I took a nice trip to visit a friend in Ramsgate at the weekend.
It was a good trip and the weather was lovely, however...
When I set off home, the car was very low on power and I ended up crawling along slowly for a while, particularly the uphill sections. Sorry!
I tried replacing some of the fuel tubing and bypassing the pre-filter, but that didn't fix it. A miles or two later, I replaced the main fuel filter, which solved the problem and I was on my way again at full speed.
I had only replaced the filter a few months ago. This indicates that a batch of fuel that I had previously filtered at home was not filtered as well as I thought it was - I'll be checking the next batch more carefully.
Changing the main filter on a 190D only takes a few minutes, assuming you carry a spare, but it can be messy. The trick is to wrap a plastic bag round the old filter before you slide it out. It is also a good idea to pour some fuel into the new filter, as the car won't run until it has turned over enough times to fill the filter.