Purpose: To share, in good faith and with documentation, a multi-year experience of serious powertrain failures and insufficient remediation, so that (a) other drivers are aware, and (b) the manufacturer/network provide a responsible solution.

Good-faith / legal note: The following describes facts and technical conclusions supported by documents (work orders, invoices, diagnostic reports, correspondence) and public sources. I do not allege intent by any individual. The manufacturer/dealer network is invited to submit a written technical response for publication. Any inaccuracy will be corrected promptly upon receipt of new information.

Vehicle ID (public documentation)

• Mercedes-Benz GLA 180 CDI (X156), first registered 2015

• Engine OM607 1.5L diesel, a Mercedes–Renault collaboration based on Renault K9K (https://en.wikipedia.org/wiki/Mercedes-Benz_OM607 , https://en.wikipedia.org/wiki/Renault_K-Type_engine)

Timeline — key points

• 07 May 2019: First immobilisation on a major Athens artery (Kifisos) due to boost loss/limp mode — a genuine safety risk to myself and other road users.

• 2019–2020: Repairs/replacements at authorised centres (see dossier).

• 2019–2023: Recurrent turbo/DPF/limp-mode symptoms; I hold emails where two authorised centres declined to take the car.

• 13 Aug 2025: New immobilisation; transfer to an authorised workshop via Mercedes-Benz Mobilo.

• Aug–Sep 2025 (escalation): The Customer Service Team to the Board of Management (Germany) replied that the case is “under investigation / awaiting feedback from Greece,” while the car remains immobilised. Concurrently, the authorised workshop that has hosted the vehicle since 13/08/2025 confirms that, to date, it has received no written instruction or technical directive from the manufacturer/importer to perform a neutral, factory-supervised inspection.

Technical picture (in plain terms)

• DPF ↔ Turbo: If exhaust aftertreatment/DPF/sensors are not healthy, thermal/back-pressure loads rise and turbo reliability suffers. Replacing the turbo without resolving root cause often leads to relapse (https://www.melett.com/technical/ , https://www.carwoodturbo.com/technic...turbo-failure/)

• Limp mode: Protective by design, but an abrupt power drop on a highway is safety-critical (https://www.rac.co.uk/drive/advice/c...nce/limp-mode/)

• Codes/symptoms: Underboost (P0299) and barometric/MAP (P222x) codes frequently relate to boost/sensor/leak issues (https://www.obd-codes.com/p0299 , https://www.obd-codes.com/p2227)

• Owner field reports (GLA/A-Class diesel, OM607/K9K): (https://www.glaowners.com/ , https://forums.mercedesclub.org.uk/ , https://www.motor-talk.de/ , https://www.aclassclub.co.uk/ , https://www.pistonheads.com/gassing/)

Why I am posting — What I am asking for

• I have experienced at least two near-miss situations, the first on 07/05/2019 in fast-moving traffic.

• Despite extensive documentation, the central response remains “under investigation,” while no instruction has been issued for a neutral, factory-supervised inspection at the workshop currently holding the car.

I request: (1) Buy-back or replacement with a safe/equivalent vehicle, and (2) a full root-cause explanation so this cannot recur for me — or anyone else.

What the manufacturer “knows” (public domain)

I do not claim concealment. Public reports exist of similar symptoms within the OM607/K9K engine family, and widely available technical literature on DPF→Turbo interactions.

Next steps / Authorities

• ECC-Net / ODR (European Commission): (https://commission.europa.eu/live-wo...res-ecc-net_en , https://ec.europa.eu/consumers/odr)

• KBA – Recalls/Market Surveillance: (https://www.kba.de/EN/VehicleTechnol...alls_node.html)

Call to fellow owners

If you own a GLA/A-Class diesel (OM607/K9K) and have turbo/DPF/limp issues, please share dates, OBD codes, work orders/invoices (with personal data redacted). More evidence = a faster, safer resolution for everyone.

 

The diesel version was never sold in the U.S.