Mercedes-Benz S450 Service A & B Maintenance

Black Mercedes-Benz S450 parked outside of our shop | Euro Auto Tech & Smog

Location: La Mesa, CA

Project Length: Less than a day

Cost:

  • Service A: $250–$400
  • Service B: $500–$700

Client Type: Residential


Project Overview:

At Euro Auto Tech & Smog, we recently serviced a Mercedes-Benz S450, a true example of luxury performance. As part of its routine care, the client was due for either Service A or Service B, two essential maintenance schedules designed to preserve long-term reliability and efficiency.


Many owners wonder if they can skip these services when their vehicle seems to be running fine—but these are preventative, not reactive. Skipping them increases the risk of unexpected repairs and expensive breakdowns.


Service A Includes:

(Typically every 10,000 miles or 1 year)

– Synthetic motor oil replacement

– Oil filter replacement

– Tire inflation check & correction

– Brake component inspection

– Reset of maintenance counter


Service B Includes:

(Typically every 20,000 miles or 2 years)

Everything in Service A, plus:

– Cabin air filter replacement

– Brake fluid exchange

– Comprehensive systems check


Whether it’s Service A or B, this routine maintenance ensures that the S-Class continues to deliver the refined performance Mercedes-Benz is known for.


Vehicle: Mercedes-Benz S450

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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