My daily driver is a 1998 Mercedes-Benz E320. Nearly 180,000 miles on the odometer, original owner, and the kind of vehicle that either becomes a money pit or, if you stay ahead of maintenance, just keeps running. I have been mostly lucky. Mostly.
With a road trip coming up, about 500 miles each way, I brought the car in for an oil change and figured I would take APS up on the free multipoint inspection while I was there. I had been driving the car without any complaints. No warning lights, no obvious issues. I was mostly expecting a green report card.
That is not quite what I got.
What the Inspection Found
The technician went through the car systematically: under the hood, underneath on the lift, all four wheels off. After about 45 minutes, I sat down with the report.
The valve cover gasket was seeping.
This is a known issue on the M112 engine in these cars. The original rubber gaskets get hard and brittle over time, and they start leaking. Mine had been seeping oil onto the hot exhaust manifold. Not a massive leak. Not puddling in the driveway. But enough that a 500-mile trip with sustained highway speeds was worth paying attention to. The technician showed me the residue on the underside of the valve cover and on the exhaust components around it, a burnt oil smell you eventually stop noticing until someone else points it out.
Coolant was overdue for a flush.
The car is 28 years old. Even with recent top-offs, the coolant test strip showed the inhibitors were depleted. On a long highway drive, especially in warm weather, your cooling system is working harder than it does in daily stop-and-go driving. Old coolant does not dissipate heat as efficiently, and it no longer protects the aluminum components and seals the way fresh coolant does. APS provides cooling system services including coolant flushes and leak detection.
Rear brake pads were at the service threshold.
Not metal-on-metal; but close enough that the technician flagged them as needed-now rather than keep-an-eye-on-it. The rear pads on the E320 wear faster than most people expect because of how Mercedes sets up the brake bias on that chassis. Had I done another 3,000 miles of daily driving before the trip, I would have been grinding rotors somewhere around Fresno. APS handles the full range of brake services — from pad replacement to fluid flushes.
Everything else came back green: the serpentine belt was still in good shape, front pads had another 30 to 40 percent of life, tire pressures were exactly where they should be, tread depth was even across all four corners, all lights worked, and the transmission fluid looked clean.
What I Actually Learned
I came in thinking I just needed fresh oil. I left with a clear picture of where the car actually stood, which is a different thing entirely.
The valve cover gasket replacement was genuinely something I could have deferred without catastrophic risk. But the technician explained that burning oil residue on an exhaust manifold over hours of highway driving increases the risk of a small fire, especially if the seepage gets worse with heat. That changed my calculation.
The coolant flush was straightforward. Old coolant is cheap insurance against expensive cooling system damage. It took about an hour, and the freshly mixed fluid came back looking right.
The rear brakes I knew about in the back of my mind. I had been telling myself I had more time. I did not really.
All three jobs were done that afternoon. The car left cleaner than it arrived.
The Part That Surprised Me
The inspection itself was free. I had expected it to be a sales technique: find a few things, generate some work. That is not how it played out. The technician had a checklist, went through it in order, and showed me what he found in each category. The green items got a brief explanation. The yellow and red items got more time: not pressure, but context. Why it matters, what happens if it is deferred, what a realistic timeline looks like.
The valve cover, the coolant, and the brakes were all genuine findings. Nothing was invented or inflated. And the items that were fine, the belt, the tires, the transmission fluid, were called as fine.
Worth Knowing Before Your Next Trip
If you are planning a long drive and your vehicle has not had a proper look-over recently, the free multipoint inspection at APS takes less time than an oil change and covers the systems that matter most for high-mileage highway driving: cooling capacity, brake condition, belts and hoses, fluid levels, and tires.
It is worth going in with an open mind. Most of the time the report will be mostly green. When it is not, it is much better to find out in the shop than on the side of the road.
APS Automotive is located at 8784 Plata Lane in Atascadero. Walk-ins are welcome for most services, including the free multipoint inspection. Call (805) 461-5823 to schedule.