2020 Mercedes-AMG A45 Tackles The Nürburgring Virtually Undisguised

[cawimmer430]

Checked on a German forum if the predecessor, the W176 A-Class, had water-cooled turbos. Nope, air- and oil-cooled. I am 99.9% the W177 (mine) has a similar setup, definitely air- and oil-cooled.

Link: https://www.motor-talk.de/forum/wird-der-turbolader-gehaeuse-im-w176-wassergekuehlt-t5834951.html

[2o6]

I wouldn't be concerned about the turbine itself, but more concerned about the engine. Head gaskets, PCV, anything that is affected by the high compression and 20+ lbs of boost.

You don't really hear that often of turbines cracking or failing....you hear of oil starvation, or connecting rod failures, or head gasket failures.

[12,000 RPM]

The only real issues I hear about with turbo engines is carbon build up on the valves (more from direct injection but the turbo's higher air temps don't help) and weird stuff like low speed preignition. Turbodiesels have been around forever and turbo gas engines have adpoted their same strategies for longevity. Only real downside is the turbo becomes another potential point of failure.

[Eye of the Tiger]

Checked on a German forum if the predecessor, the W176 A-Class, had water-cooled turbos. Nope, air- and oil-cooled. I am 99.9% the W177 (mine) has a similar setup, definitely air- and oil-cooled.

Link: https://www.motor-talk.de/forum/wird-der-turbolader-gehaeuse-im-w176-wassergekuehlt-t5834951.html

No sprecken zie deutch.
But a purely air-oil cooled turbocharger is very rare these days.

The US market 2018 C300 also has the M260/264 engine, and parts number 11 and 12 in the catalog are coolant lines that attach to the turbocharger.

https://www.mbpartscenter.com/v-2018-mercedes-benz-c300--base--2-0l-l4-gas/engine--turbocharger-and-components

[cawimmer430]

No sprecken zie deutch.
But a purely air-oil cooled turbocharger is very rare these days.

The US market 2018 C300 also has the M260/264 engine, and parts number 11 and 12 in the catalog are coolant lines that attach to the turbocharger.

https://www.mbpartscenter.com/v-2018-mercedes-benz-c300--base--2-0l-l4-gas/engine--turbocharger-and-components

But that motor possibly has a different turbo-cooling setup than the current W177 A-Class. 

[cawimmer430]

Mr. AMG giving us some amazing insight. This engine is insane. 

www.youtube.com/watch?v=-YBmG15FzuQ

[Eye of the Tiger]

But that motor possibly has a different turbo-cooling setup than the current W177 A-Class. 

 

[AutobahnSHO]

that's bonkers!

And the old (turbodiesel) Army trucks we drove 15years ago said after driving you were supposed to idle it for 5min before turning it off.

[cawimmer430]

that's bonkers!

And the old (turbodiesel) Army trucks we drove 15years ago said after driving you were supposed to idle it for 5min before turning it off.

That was also the general consensus for the turbo cars of the 1980s like the Lancia Delta Integrale etc. Before turning them off, have them idle for 2-3 minutes.

[FoMoJo]

That was also the general consensus for the turbo cars of the 1980s like the Lancia Delta Integrale etc. Before turning them off, have them idle for 2-3 minutes.

Yes, before they thought of running water/coolant lines/channels through them to protect the bearings.