I didn’t know that the Tiptronic unit was a MB 722.6.

I am very familiar with those transmissions and they are bullet proof. My family has owned one from new (98) all the way up to 220K miles. It had its first transmission service at 155K miles when it started to slip and worked perfectly afterwards.

I also personally owned one in an 05 ML350; it did have issues due to the TCU plug leaking fluid out. Thankfully replacing the TCU plug fixed it; but that could have been an expensive fix if the oil seeped into the TCU. The plug and transmission service was only 760 bucks back in 2014 at the dealer.

Which brings me to the only Achilles heel of the 722.6 on Mercs: transmission fluid can seep up through the TCU plug into the TCU which becomes an expensive fix.

Also early 722.6’s were advertised as sealed for life; but unmaintained units respond well to a fluid change and there’s almost no risk of problems in the valve body.

Dayum you guys are lucky; the neighbors called the county on us and we forced to donate my NA Miata with 80K miles that was parked in our driveway.

Montgomery County Maryland. Illegal to have an unregistered car in your private driveway of a single family residence. Illegal to park a boat in your driveway. Illegal to sell Christmas trees before December 2nd. Literally worse than California.