Mercedes GLS / GL Common Problems & Tips
The Mercedes GLS (and GL before it) is a large seven-seat luxury SUV. A Cranbourne West Mercedes specialist covers the common problems and ownership tips.
About the GLS
The GLS (X166 & X167) is a popular choice locally, and a genuinely good car when it’s serviced correctly with the right oils and parts. As an independent Mercedes specialist in Cranbourne West we know exactly where each model needs attention — so you own it for far less than the dealer charges.
Catch the known items early and a GLS stays reliable and a pleasure to drive.
Common GLS problems
The issues we see most on the GLS: air-suspension (AIRMATIC) faults, cooling-system wear, oil leaks, heavy front suspension wear, and diesel DPF/EGR care on the diesels. None of these are unusual for the model, and all are far cheaper to address early than to ignore.
We use dealer-level STAR diagnostics to find the real fault rather than guess, and the correct Mercedes-spec oils and genuine-quality parts on every job.
Servicing your GLS for less
We service the GLS to the Mercedes A/B (ASSYST) schedule, reset the service indicator, and give fixed written pricing — typically well under dealer cost. Buying used? A pre-purchase inspection checks the GLS-specific trouble spots so you don’t inherit someone’s deferred maintenance.
Already own one? Book it in for an honest health check.
Mercedes GLS / GL Common Problems & Tips — FAQ
Yes, with correct servicing. Large and complex, so a specialist who knows the weak spots is key.
AIRMATIC faults, cooling wear, oil leaks, suspension wear, and diesel DPF/EGR items.
Yes — the auto benefits from a transmission service that’s often skipped.
Manageable with a specialist catching issues early and fixed pricing.
Related guides & services
Mercedes need attention?
Trusted Cranbourne West car specialists — RACV-accredited, fixed written pricing. Book online or call 03 8782 0711.