moin moin, it’s about w 220 070 with 113 941, mj 05. problem is that the service booklet edition A2, 06/04 under additional work on page 34 says: “With more than 250,000 km/15 years difference to the last change: renew coolant – observe coolant composition”. and on page 36 says: “every 3 years: renew coolant – observe coolant composition” because my good old master is omniscient of the nl in rest, I promptly got two different coolant-friendly nfte get. which one is right? (please don’t answer à la: “let’s do anything, don’t hurt anything” or any gimmicks). thank you for postings by scientists. so long.