A Mercedes rarely fails loudly. It sags a little at one corner, or shifts less smoothly than it did, or shows a message with no obvious cause. We find out which system is actually responsible before anything gets replaced.
Almost everyone who calls is somewhere in one of these three situations.
Every job on a Mercedes starts on XENTRY, the factory software, and ends with a written 12-month, 12,000-mile warranty.
Every marque has its own failure patterns. Knowing them is the difference between diagnosing a car and experimenting on it.
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There’s nothing but good things to say about this shop. This car needed a lot of work from oil leaks, engine mounts, airbag light, to coolant leaks, and they did this work in a day. Fast and great work. This if for sure my go to shop from now on. Highly recommend!
I've been coming here for years, and the quality of work and customer service is always great! They also work quickly, so there's very little downtime whenever I drop off my car. I'd recommend German Performance to anyone who needs a trustworthy mechanic!
No. Federal law protects your right to use an independent shop for maintenance and repairs without voiding the factory warranty, as long as the work is performed correctly with appropriate parts. We keep thorough records for exactly this reason.
ASSYST Plus alternates them, roughly every 10,000 miles or once a year. Service A is the oil and filter, fluid levels, tire pressures and a set of checks. Service B adds the cabin filter, the brake fluid on its two-year interval, and a longer inspection list. We do the sheet the car is due for, with the oil on the Mercedes approval for your engine, and reset the reminder to the next correct service.
Because the level is only meaningful at a specific fluid temperature. Checking it cold or hot gives a misleading reading, which is how transmissions end up incorrectly filled.
Usually, yes. On the 722.6 and later units the conductor plate, the valve body and the 13-pin connector cause most of the harsh shifting, limp mode and speed-sensor faults we see, and each is replaceable on its own. We test them before a transmission is condemned, and a whole-unit quote for one of these faults deserves a second opinion.
Usually an air suspension leak, most often a strut, though the compressor or valve block can produce the same symptom. It is worth diagnosing early, because a failing compressor that runs constantly tends to destroy itself.
Yes. AMG variants use different components and torque specifications than the standard range, and we set them up to the correct specification.
Models we service: A, C, E and S-Class, CLA, CLS, GLA, GLB, GLC, GLE, GLS, G-Class, SL, SLK, Sprinter, and AMG variants.
What we have learned on the Mercedess that come through the shop, written down: what to maintain, how we diagnose a symptom, what moves a bill, and jobs from our own bays. All repair guides →
German Performance has worked only on German cars since 2010, more than 10,000 of them through this shop. The technicians are ASE-certified and Mercedes-Benz factory-trained, one an ASE Master Technician with the advanced engine diagnostics certification, and every Mercedes repair leaves with a written 12-month, 12,000-mile parts-and-labor warranty. Serving Snellville, Loganville, Grayson, Lawrenceville and all of Gwinnett County. German Performance is an independent German auto repair shop in Snellville, GA that works on Mercedes-Benz and four other German makes, and nothing else.