I realized that I haven’t posted anything since July. Since then I’ve sorted out pretty much everything that was ailing the S600. After I finally had the dealer replace the ABS/ESP control module, that fixed most of the issues. I had a nagging problem with peeing coolant overboard after driving, but that turned out to be the cheap coolant tank cap I bought at AutoZone. Supposed to be a high quality part — nope. I bought a new one from Mercedes-Benz, and the problem went away completely.
The intercooler circuit has been working flawlessly since I put the new pump in and had the system bled, giving me full turbo boost under all conditions within its design limits. I replaced the conductor plate in the transmission, which fixed a shift issue that popped up. I replaced a seeping valve cover gasket, and while I was in there did all the spark plug boots as well… the parts are cheap. All of this was really just fixing things that had been ignored by the previous owner and his servicing shop. The only thing that pissed me off, really, was the ABS module — there’s no way in hell the dealer didn’t know about that.
In October, we took the car on a week long, 3,000 mile road trip. We drove through NE, KS, CO, UT, NM, AZ, and back. We stopped at the Four Corners monument, stayed at the Grand Canyon, saw Santa Fe and Albuquerque, visited the Petrified Forest, and more. The only thing I noted was what felt like a little bit of a lack of power when passing at high altitude. I decided not to worry about it… we were on vacation, I wasn’t going to dig under the hood. Wish I had! It was a simple thing. The air intake pipe between the intercoolers and the throttle body had popped off — some fool (me) had not sufficiently tightened a clamp and it blew off. The car still went like hell, with no problem passing even at 8-9K feet elevation. But imagine what it WOULD have done… wow. It took me all of ten minutes to fix that.
The cost hasn’t been as bad as I had expected. Parts have been surprisingly reasonable. The ABS control unit was the worst; you can’t buy used, and the dealer has to install it. Period. The rest, though, was not a big deal, really. Fortunately I found a local shop where you can rent a bay with a lift, which made doing the transmission service and conductor plate easy.
Overall… unlike some cars, you can’t just drive these things and not touch them except to change the oil and tires. It’s a high performance machine, and requires that the owner pay attention to maintenance or it will break. That’s all there is to it. So the maintenance cost is higher than, say, my F150 that I haven’t had to touch other than oil and tires since I bought it.
But the truck doesn’t massage my back while I’m cruising at speeds that would scare me in a lesser car, either.
That said, it’s time to part ways. I love the car, I truly do. But, when I bought it the plan was to sell the truck and not keep an excess vehicle. Well, that hasn’t happened, and we realize that we will probably need the pickup for another couple of years. I’ve got the car listed for sale (at a great price, I might add). I’m looking forward to shopping for an S65 in a few years…