2019 Mercedes-Benz B-Class Problems: 2 Issues Every Owner Should Know
2019 model year · 970+ owner reports · Updated April 2026
According to Au7o's analysis of 970+ owner reports, the 2019 Mercedes-Benz B-Class has 2 documented known issues. No issues are rated critical, indicating generally reliable ownership. The most commonly reported issue is Dual-Clutch Transmission (DCT) Shudder at Low Speeds with 680 owner reports. Across all issues, repair costs range from $200 to $3,500. DIY maintenance guides at au7o.io.
All 2 Known Issues
On the 2013-2019 Mercedes-Benz B-Class 2.0L Turbo I4, the 7-speed dual-clutch transmission (7G-DCT) in the B-Class develops a noticeable shudder during low-speed maneuvers and from a standstill. The issue stems from clutch pack wear and adaptive software that struggles to compensate as the clutch material thins over time.
Common Symptoms
- Vibration during low-speed acceleration
- Jerky takeoff from stop
- Shuddering between 1st and 2nd gear
- Hesitation when creeping in traffic
How to Fix
Start with a DCT adaptation reset via Mercedes XENTRY diagnostic tool. If shudder persists, the dual-clutch assembly requires replacement. Updated clutch packs with revised friction material are available and significantly improve longevity.
What Owners Are Using
Parts and tips from 680+ owners who fixed this issue
- TipA transmission adaptation reset often buys time, but the clutch pack will eventually need replacement. Budget for it around 60,000-80,000 miles.
On the 2013-2019 Mercedes-Benz B-Class, the turbo oil feed line on the M270 engine in the B-Class develops leaks at the banjo bolt connection on top of the turbocharger. Oil drips onto the hot exhaust manifold, producing a burning oil smell and visible smoke from the engine bay.
Common Symptoms
- Burning oil smell from engine bay
- Visible smoke from under hood
- Oil drips on exhaust manifold
- Low oil level between services
How to Fix
Replace the turbo oil feed line and both copper crush washers at the banjo bolt connections. Inspect the turbo for bearing play while the line is disconnected. Clean oil residue from the exhaust manifold to eliminate the burning smell.
What Owners Are Using
Parts and tips from 290+ owners who fixed this issue
- NoteOil on a hot exhaust manifold is a fire risk. Address the leak promptly and monitor oil level weekly until repaired.