Do we have one or two turbos?

[Cherrypd]

Hi folks,

As per the title for nerdiness.

My A207 (E250) 2010 with an engine code 651.911 (204bhp)

His x218 (CLS220) 2016 with an engine code 651.924 (177bhp)

Thank you.

 

[FlorinM]

Both have 2 turbos.

 

[TeddyRuxpin]

Are you sure about that

 

[FlorinM]

The 170 PS (125 kW) and 204 PS (150 kW) versions employ a 2-stage (bi-turbo) charging setup with a small, high pressure turbo providing quick boost at low RPM fed by a large, lower pressure turbo providing increased performance at higher RPM, then at highest rpm ranges and loads, using both simultaneously. The lower output versions have only a single turbocharger.

That's what I found on Wikipedia.

 

[Gazwould]

My understanding with the 2143cc OM651 is that the two higher outputs are bi turbo with the higher 204 hp having a larger main turbo .

There is a 136 hp version of the OM651 and this would definitely be a single turbo .

 

[TeddyRuxpin]

Fascinating - I thought all MB diesels of this era were single turbo

 

[rf065]

Fascinating - I thought all MB diesels of this era were single turbo

They have a small turbo that spins up quickly to eliminate turbo lag, that feeds into a larger one for more power further up the rev range.