Owners agree the 6.9 is expensive to run and never meant for cheap fixes, and that competent shops willing to work on them are increasingly scarce. Whether the car is 'extremely complex' is disputed: some say farming out the work will vacuum your wallet but a mildly mechanically inclined owner can fix most issues themselves, while others insist they are genuinely complex and can cost thousands in labor to sort. …
Running costs and the DIY imperative
Mercedes-Benz 450SEL 6.9 · ownership