Mercedes-Benz S65 Maintenance & Repair

Black Mercedes-Benz S65 parked outside of our shop | Euro Auto Tech & Smog

2015 Mercedes-Benz S65 – Full-Service Maintenance That Keeps Performance Legendary


Owning a luxury vehicle like the Mercedes-Benz S65 means expecting excellence — but over time, even high-performance machines can develop issues that threaten that experience. This La Mesa owner was dealing with signs of wear that could have led to serious performance loss: minor oil leaks, aging mounts, and increasing carbon buildup that dulled the car’s signature power.


That’s where we stepped in. At Euro Auto Tech & Smog, we guided the owner through a clear, no-stress maintenance plan. First, we diagnosed common S65 trouble areas like:

  • Turbo oil line seepage
  • ABC system wear
  • Intake valve carbon buildup


Then, using premium materials like Liqui Moly fluids, we tackled every concern in a single-day service — including:

  • Full synthetic oil and filter change
  • Resealing turbo lines
  • Inspecting engine mounts


The result? This Mercedes S65 left our shop feeling factory-fresh. Smoother shifts, tighter handling, restored power, and cleaner intake flow — all tuned to keep the car running at peak performance. The transformation wasn’t just mechanical; it gave the owner back confidence in every drive.


Ignoring early signs of wear could’ve led to far more costly repairs — or worse, a serious failure on the road. Instead, this proactive approach preserved both performance and peace of mind.


Your vehicle deserves the same care. Let’s make sure your drive stays as powerful and smooth as the day you bought it.


Schedule your service today and give your car the expert attention it deserves.

August 28, 2026
Let’s talk shop. This 2014 Audi SQ5 came through the shop with what looked like a fairly routine oil leak. But once we got it on the lift and started digging deeper, we found a little surprise hiding behind the symptoms. Let’s dive in. Diagnosis On the 3.0 supercharged V6, timing chain system issues can become a serious concern as mileage adds up. Chain stretch, worn guides, tensioner problems, and related components can lead to timing faults, rattling noises, especially on cold starts, and, if ignored, potentially major engine damage. Another major issue is that the timing chain is located at the rear of the engine, which means that replacement is an intensive, labor-heavy service requiring partial or full engine removal. What Needs to Be Done When timing chain wear is confirmed, the repair needs to be approached as a complete system, not simply “replace the chain” and call it a day. Depending on what the inspection reveals, this can include timing chains, guides, tensioners, seals, and other related components. We also inspect the surrounding areas for oil leaks and signs of wear while everything is accessible. Pro Tip: If you start hearing noticeable rattling on startup, the car develops timing fault codes, or you’re seeing unexplained oil leaks, don’t wait until the check engine light comes on. By that time, you might be dealing with a bigger problem. Result: A smooth ride and a happy driver. The goal isn’t just to quiet a noise or clear a code. It’s proper diagnostics to know the root cause and a proper mechanic who knows the proper repairs. Catch us every Friday for more shop talk. And remember: Good work ain’t cheap. Cheap work ain’t good. Euro Auto Tech & Smog | European Specialist | 7633 El Cajon Blvd #217, La Mesa, CA 91942
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