Mercedes BlueTEC Service A/B, PowerStroke, Duramax, and Cummins — diesel diagnostics, maintenance, and DPF service from ASE Master certified technicians.
Diesel engines are built for power, torque, and longevity, but they require specialized knowledge and equipment to service correctly. At RepairTech Automotive in Kissimmee, FL, our ASE Master certified technicians have the training and diagnostic tools needed to work on light and medium duty diesel vehicles, including the most popular diesel platforms on the road today: Ford PowerStroke, Chevrolet/GMC Duramax, and RAM Cummins engines.
Modern diesel engines are far more complex than their predecessors. They rely on high-pressure common rail fuel injection systems operating at pressures exceeding 30,000 PSI, variable geometry turbochargers, exhaust gas recirculation (EGR) systems, diesel particulate filters (DPF), diesel exhaust fluid (DEF) injection systems, and sophisticated engine management computers. Diagnosing problems in these interconnected systems requires diesel-specific scan tools and a thorough understanding of how each component interacts with the others. Our Snap-On diagnostic platform provides the deep system access required for accurate diesel diagnostics, including injector coding, DPF regeneration commands, and turbocharger actuator testing.
The turbocharger is the powerhouse behind every modern diesel engine, and when it starts to fail, the symptoms are unmistakable: excessive black smoke, loss of power, unusual whistling or whining noises, and increased oil consumption. At RepairTech Automotive, we diagnose turbocharger problems by testing boost pressure, inspecting the variable geometry vane mechanism, checking for shaft play, and verifying the electronic actuator operation. Whether your turbo needs a rebuild or replacement, we use quality components that meet or exceed OEM specifications.
The diesel particulate filter is a critical emissions component that traps soot particles from the exhaust stream. Over time, the DPF accumulates soot and must undergo a regeneration cycle to burn off the collected particulate matter. When the DPF becomes excessively clogged, the engine enters a reduced power mode and triggers warning lights. We perform forced DPF regenerations, clean DPF units, and diagnose the underlying causes of excessive soot loading such as faulty injectors, EGR valve malfunctions, or turbocharger problems that prevent normal regeneration cycles from completing.
The DEF system, which injects diesel exhaust fluid (AdBlue) into the exhaust stream to reduce nitrogen oxide emissions, is another common source of diesel trouble codes. We service DEF injectors, DEF pumps, NOx sensors, and SCR catalytic converters. We also handle diesel oil change services using the correct CJ-4 or CK-4 rated diesel engine oils and premium filtration, glow plug diagnostics and replacement for hard starting and cold weather performance, and fuel system services including water separator maintenance and fuel filter replacement to keep your diesel running clean and strong.
Diesel maintenance is not one-size-fits-all. We follow the factory schedule for your engine — quoted at check-in, no menu prices on the website.
Mercedes-Benz BlueTEC passenger cars and SUVs use the same ASSYST program as gasoline models. When your cluster shows Service A or Service B, we confirm which is due, perform the factory checklist with diesel-rated full synthetic oil, check DEF level, inspect the fuel filter interval, and reset the service indicator through Autologic.
Service B adds the major-interval items — cabin filter, brake fluid exchange, and additional mileage-based filters — on top of everything in Service A. See the full A vs. B breakdown on our European auto repair page.
Domestic light-duty diesels do not use Mercedes-style Service letters. Each manufacturer publishes its own interval schedule — typically combining oil and filter service, fuel filter replacement, DEF top-off, and coolant or transmission milestones at specific mileage and time marks.
Our diesel minor service includes:
Every diesel visit includes inspection. If we find deferred work — clogged DPF, worn injectors, turbo concerns — we document it and quote repair separately. Nothing proceeds without your approval.
Deep experience with the three most popular diesel platforms on the road today.
6.0L, 6.4L, 6.7L, and 7.3L PowerStroke diagnostics and repair. FICM testing, injector service, turbo diagnostics, and EGR system repair.
LBZ, LML, LMM, L5P, and all Duramax variants. Fuel system diagnostics, CP4 pump issues, injector balance rates, and emissions system service.
5.9L and 6.7L Cummins diagnostics and repair. VP44 and CP3 fuel pump service, turbo actuator calibration, and aftertreatment system diagnostics.
Yes — light and medium duty diesel truck repair is a core service. Those three platforms each have their own known failure patterns, and our ASE Master certified technicians diagnose them rather than swapping parts.
Black smoke generally means too much fuel or not enough air — injectors, turbo, or an intake restriction. White smoke on a warm engine often points at unburned fuel or coolant entering a cylinder. The color narrows it down, but only testing confirms it.
More often than most owners expect, and it matters more than on a gas engine — modern high-pressure common-rail systems are unforgiving of contamination, and a fuel system failure is a very expensive repair. We check filter condition on every inspection.
Veteran-owned, ASE Master certified, and equipped for every diesel platform. Walk-ins welcome.
