Although Bangernomics still makes a case for buying a £1000 vehicle and deliberately not spending anything on it, until it's scrapped. (The "Dog's car," for example)
You are joking of course - if that is the dogs car. Those W124 estates are a national treasure.
I recently heard of a relatively low mileage Range Rover that needs a new replacement engine because the oil wasn't change for 15,000 miles. The reason for missing the service was lock down which is fair enough but a diy oil change could have been done for £20. Using the 20L container of genuine MB oil I bought a few years back for £48 I'm changing mine at £15 a time.