Arlington Auto Repair

If you drive a modern diesel, the diesel particulate filter (DPF) is the reason your exhaust stays clean. It traps soot during normal driving, then burns that soot into ash during a process called regeneration. Regeneration is built into the car’s software, and when it works as intended, you barely notice it. Problems start when regens are interrupted or the car never gets the right conditions to complete them. What the DPF Catches and Why It Needs Regeneration A DPF is a ceramic honeycomb that traps microscopic soot. Over time the cells fill up and backpressure rises. To clear it, the engine raises exhaust temperature so the soot burns into a small amount of ash. Ash stays in the filter and accumulates slowly with mileage, which is why very high mileage diesels eventually need a professional cleaning or replacement even if nothing is broken. Three Types of Regeneration There are a few ways the system cleans itself: Passive regeneration hap ... read more

As the temperatures drop and days get shorter, diesel vehicle owners have a few extra tasks to consider. Diesel engines are durable and efficient, but they react differently to cold weather than gasoline engines. If you're heading into fall without a maintenance plan, you may be risking hard starts, reduced fuel economy, or unexpected downtime. Here are five important maintenance steps to help keep your diesel car or truck running strong through the colder months. 1. Inspect and Replace Fuel Filters Fuel filters play a crucial role in diesel performance. Diesel fuel naturally contains more impurities than gasoline, and over time, those contaminants build up in the fuel filter. During colder months, water and debris trapped in the filter can freeze, slowing the flow of fuel and leading to hard starts or rough idling. If you haven’t replaced the fuel filter recently, fall is a good time to do it. Some diesel vehicles have both a primary and secondary fuel f ... read more

Auto glass replacement used to be a straightforward task, but that’s no longer the case for modern vehicles. Today’s cars come equipped with Advanced Driver Assistance Systems (ADAS), which rely on cameras and sensors mounted directly on the windshield. These systems include features like lane-keeping assistance, forward collision warning, automatic emergency braking, and adaptive cruise control. So what happens if you replace a windshield and skip ADAS calibration? You risk losing the accuracy of these systems, and that could put your safety at risk every time you drive. How ADAS Uses Your Windshield Most ADAS features depend on a front-facing camera mounted just behind the rearview mirror. This camera monitors the road ahead, reads lane markings, detects vehicles and pedestrians, and helps power automated responses. Even a slight misalignment of this camera can throw off the entire system. The glass itself also plays a role. Some windshields come with ... read more

When Mercedes-Benz introduced the W123 series in 1976, it was meant to be the company’s reliable, mid-sized sedan line—comfortable, durable, and refined, but still affordable compared to the brand’s flagship models. What Mercedes did not anticipate was that the W123 would become so well-built and long-lasting that it would create a problem for the company: customers were not replacing their cars often enough. The W123 earned a reputation as one of the most durable vehicles ever made, but its success also nearly pushed Mercedes-Benz into financial trouble. A Reputation for Unmatched Durability Mercedes designed the W123 with longevity as a top priority. It was built during an era when cost-cutting was minimal and engineering quality came before profit margins. The result was a car that could easily surpass hundreds of thousands of miles with routine maintenance. The body was solid, the engines were built to run for decades, and the interior materia ... read more

Porsche is known worldwide for its commitment to blending performance and everyday usability, and one of its most celebrated innovations is the PDK transmission. PDK stands for Porsche Doppelkupplungsgetriebe, which translates to "Porsche double-clutch transmission." This advanced system offers lightning-fast gear changes and has transformed how enthusiasts and everyday drivers experience Porsche vehicles. But how exactly does it work, and what makes it so special compared to other transmission systems? What Is a Double-Clutch Transmission A double-clutch transmission (DCT) is a type of automated manual transmission that uses two separate clutches for odd and even gear sets. In a traditional manual transmission, one clutch is engaged and disengaged by the driver, but in a DCT, two clutches operate alternately to pre-select the next gear. This design allows for near-instantaneous gear changes without interrupting power delivery to the wheels, resulting in s ... read more