4 cylinder turbo engine reliability
 

I've got an acquaintance with a GLx with the turbo 4 engine. It may be a GLB, I don't remember. Anyway he had the cylinder head replaced by MB under warranty. The other day he was driving he said the engine split? Not sure exactly what happened but it was a catastophic failure at 52k miles. Reading a little in google it sounds like they have a rep for putting rods thru the block. Now MB is putting a replacement engine in it. Has anyone heard of the turbo 4 in the late model cars being problematic?

I'm now reading too to steer clear of the 48 volt system (I'm assuming like in the GLS450) hybrid with the inline turbo six. Based on a couple post on MB World it sounds like it is problematic too.

Any comments regarding issues with these systems? I was considering buying a used GLS with the inline 6 but have backed off of that thought until I read more about it.

Jim,
I've been considering the purchase of a new Mercedes-Benz 2025 Sprinter van with the 4-cyl. twin turbodiesel engine. It's performance specs are great, I haven't read or heard anything yet about its holding up though.

Mercedes-Benz also increased the number of gears in the AT, (automatic transmission)

The engine had been the 3.0 liter V6 turbodiesel, for years and years.

When I saw the thread title, 4-cylinder.....that's why I posted my interest.

Although I don't have much info to support it I am pretty comfy with owning one. I am pretty relaxed about turbos diesel or gas.

I have encountered the same on a GLB - engine was windowed for no good reason. I think its a really high stress engine which has absolutely no margin for any off tolerance running and goes kaboom.

4 cylinder turbo engine reliability
 

I drive a 24 Mercedes 2500 4 cylinder everyday. Good truck. Engine is resilient. User interface is dumbed down (no dipsticks). One odd thing is the owners manual states it’s normal to burn a quart of oil every 600 miles. I have been staying on top of the level via the dash display but it’s a weird combo for an admitted burner not to have a dip stick.

It also empties the DEF tank every three tanks of fuel. My 2016 would go through 5 tanks of fuel per DEF refill.

Another quirk is the touchpad on the steering wheel. It’s real easy to brush it and change the display. I have tape over mine.

The engine seems well designed as far as endurance though.

https://uploads.tapatalk-cdn.com/202...e495a93d81.jpg

I was referring to the gassers when I put question out there.

Talked to acquaintance that has a GLx with the turbo four. The engine had a catastrophic failure at 65k miles. Reported on the paperwork that valve broke then connecting rod came through side of block. Jackson Automotive, Macon, Ga replaced the engine at no cost to the owner:).

I think that you have to be meticulous about engine oil selection and oil change intervals with any small displacement turbo engine. Between the close tolerances of the turbo moving parts and the additional stresses placed on the engine itself, you are begging for a headache if you become casual about engine maintenance. I have owned just one turbocharged vehicle so far, equipped with a twin-turbo V6, and treated it to full synthetic oil changes every 3,500 miles.

Yeah,I think that those m260 engines are a complete disaster.

m260 engine

Hate to hear that. The older I get the less I want anything with a turbo or supercharger on it. Only vehicles I own with turbos are diesels.

Stumbled on above thread when I googled m260 MB engine. I talked to the service advisor (who I've known for a long time) at the local MB dealer and she kinda quietened up when I inquired about how many they have through there with issues. She did say that was the first one she had seen with a rod through the block though.

Yeah. It's just the way Mercedes has been evolving. I've worked on these for the last 30+ years and have owned them for 40. The trend for quality, IMO, has steadily been going down. The only reasoning that I can come up with, is that the engineers are losing the battles with the bean counters.