GLK250 Turbo Intercooler Hose
MBWorld Fanatic!




Joined: Jun 2021
Posts: 1,899
Likes: 507
From: New Hampsha
'17 GLS450, '14 GLK250, Grandpa's Roadster
Well, as expected, it's back. This time I have 3 codes, P0299, P056E and B2aaa. Not sure if the third one means anything, but the other two seem to point to turbo control issues. Any suggestions? I'm trying to get my Scangauge to display MAP, but so far no luck.
MBWorld Fanatic!




Joined: Jun 2021
Posts: 1,899
Likes: 507
From: New Hampsha
'17 GLS450, '14 GLK250, Grandpa's Roadster
Anyone tried the Rein hose from FCP Euro? In stock and half the price of the OE part. There's even this subtle implication: "The Rein brand includes a growing number of 'better than OE' parts for selected applications. These parts address known weaknesses and premature failures of factory parts."
Last edited by John CC; Jul 15, 2025 at 10:21 AM.
I'll know tomorrow after my appt.
MBWorld Fanatic!




Joined: Apr 2003
Posts: 1,032
Likes: 277
From: Northeast
2012 S350 Bluetec, 2014 GLK250 Bluetec, 2026 E350 4Matic
I have the same tear in my X204 intercooler hose and the same P0299 & P056E codes as of recently. I am still in the AEM warranty window but the dealer won't confirm on the phone that it's covered or 'reasonably' related to the modification and warranty coverage until after a $295 diagnostic fee. Wondering if anyone else has had to fight for a coverage with this particular situation?
I'll know tomorrow after my appt.
I'll know tomorrow after my appt.





