Link to products to do this yourself: mercedessource.com/store/dies... Remember the days of "Instant Engine Overhaul" that you could buy at the auto parts store? We all know that really does not work especially on diesel engines that are worn out. BUT a good internal engine "cleanse" cannot hurt and you may see performance improvements.
Link to previous video showing initial startup after 10 years: • Raining W126 300SDs in...