Knowledge base
Common Faults
Practical guides on Mercedes servicing, diagnostics, common faults and ownership — written by the technicians doing the work.
-
faults
Mercedes Timing Chain Replacement: When It Is Needed, What It Costs & Which Engines Are Affected
Timing chain failure is one of the most expensive engine repairs on a modern Mercedes — but it almost always gives warning signs before catastrophic failure. Here is every affected…
Read → -
faults
Mercedes Common Faults by Mileage: What to Expect at 50k, 100k & 150k Miles
Mercedes faults are surprisingly predictable by mileage. Here is exactly what to expect at each milestone so you can budget for maintenance rather than being surprised by breakdowns.
Read → -
faults
Mercedes Vito DPF Issues: London Private Hire Reality & What It Costs to Keep One Running
The Vito is a London private hire workhorse — but short urban journeys, extended idling, and AdBlue demands create a unique set of maintenance challenges. Here is what every Vito…
Read → -
faults
Mercedes Sprinter Common Faults (W906 & W907): What Every Owner and Fleet Manager Should Know
The Sprinter is the backbone of countless London businesses — but four well-known faults can put one off the road for days. Here is what they are and how to…
Read → -
faults
Mercedes GLE & ML Transfer Case Motor Failure: Symptoms, Diagnosis & Repair
The 4MATIC transfer case on the GLE and ML can develop motor and chain faults that affect all-wheel-drive operation. Here is how to spot the symptoms before the repair bill…
Read → -
faults
Mercedes 9G-Tronic Judder: Why the 40k Mile Fluid Service Is Non-Negotiable
The 9G-Tronic is a superb gearbox — but skip the 40,000-mile fluid service and you will experience judder that starts as an annoyance and ends as a four-figure repair. Here…
Read → -
faults
Mercedes SBC Brake System: The Complete Guide to Service, Failure & Costs (W211, W220, SL R230)
The SBC electronic brake system on the W211 E-Class, W220 S-Class, and R230 SL was revolutionary — but it has a finite service life. Here is what every SBC-equipped Mercedes…
Read → -
faults
Mercedes OM642 EGR Cooler Failure: Coolant Loss, Diagnosis & Repair Costs
Unexplained coolant loss on an OM642 V6 diesel is frequently caused by a leaking EGR cooler — not a head gasket. Here is how to diagnose it correctly and what…
Read → -
faults
Mercedes M270/M274 Timing Chain: A-Class, GLA & C-Class Guide to Diagnosis and Repair
The M270/M274 turbo petrol engine shares its timing chain design with the M271 — and the same stretch problem. But the transverse layout in the A-Class and GLA makes the…
Read →
Book your Mercedes in with confidence
Dealer-level Xentry / Star diagnostics, genuine parts and a 12-month workshop warranty. Speak to a technician today.