10.0

really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
61,478 miles

About These NHTSA Complaints:

The NHTSA is the US gov't agency tasked with vehicle safety. Complaints can be spread across multiple & redundant categories, & are not organized by problem. See the Back button — blue bar at the very top of the page — to explore more.

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problem #12

May 192022

SLK320

  • miles
* Brake system has failed by brakes applying randomly; research indicates due to faulty YAW sensor and Lateral Movement sensor per mechanic who retrieved the codes. Per Mercedes Benz, these sensors are no longer available and they're no longer making them. There are no aftermarket parts available. * Brakes have applied randomly at various speeds and causes a loss of control of the vehicle. This has been happening over the last few months and poses a very deadly situation. * Independent MB Specialist Master Mechanic pulled codes and confirmed problem. He advised there are no parts available. * No lamps indicated problem was imminent.

- Yucca Valley, CA, USA

problem #11

Jul 252020

SLK320

  • 135,000 miles
On three occasions the brakes were applied by the stability control system without driver intervention. In the most recent occurrence this action placed the driver and other motorist in the vicinity of the car in extreme danger. Traveling East bound on highway 80 through fairfield California in the left lane at approximately 75 mph, the brakes were abruptly activated by the stability system causing the car to yaw to the right and then suddenly to the left. Fortunately there was enough distance between other motorist that there was not a collision. The car did however almost collide with the center barrier. This was an extremely dangerous situation.

- Grass Valley, CA, USA

problem #10

Jan 032018

SLK320

  • 79,861 miles
I do not know what this is involving, but from what I have read it may be a sensor and everybody that has had this problem could not easily get a mechanic that understood what to do. This is a very dangerous issue. This has happened now three times and I cannot drive the car now. I have low mileage on this car. I was driving about 55 miles and hour and suddenly my car braked, made a scraping noise & swerved to the right. This lasted 20 seconds. It scared me since someone was behind me and about ran into my rear end, not to mention other cars around me. My mechanic checked my car with the Benz computer system and did not find anything and told me sometimes this happens and it never happens again. Tonight it happened two more times on the freeway and while driving over the canyon where many cars go off the canyon road over cliffs. It lasted a good 20 seconds doing the same thing and it was a crowded freeway. This time I found that my bas/esp light came on. After researching this issue I find that your company dropped the recall issue on this car when this is an extremely serious problem. Most mechanics cannot fix this problem and I see that Mercedes knows about this & that there was a potential recall issue. Does somebody need to die to fix this with a recall" very frightening that this issue has not been taken care. As said many mechanics don't know what it is and cars still have the same serious problem. How can this issue be taken lightly?"

- Malibu, CA, USA

problem #9

Apr 152017

SLK320

  • 49,500 miles
Vehicle applied brakes on it's own at highway speed and no driver application. The bas/esp alarm lights came on and the vehicle seemed to be ok until it was turned off. The alarm cleared when restarted but the vehicle applied brakes again on it's own and the indicators came back on. The repair shop could not get a code because it was not on when they checked it. This has happened at least 10-12 times but only during hours when the business is closed. I let my local mechanic drive it for a week and it never happened with him. This is very sporadic but dangerous situation. I've seen numerous entries on slk forums with owners having the same problem with this vehicle.

- Cross Hill, SC, USA

problem #8

Jan 302014

SLK320

  • miles
My brake lights are defective; they have been repaired several times but after a few months, they stop working. I have this car since 2006 and have been told this was a recall issue. But when I went to autobahn motors in belmont, ca, they refused to repair them. I was told by another mb dealer that the recall was finished and by another that they had been repaired at some point (?); I understand that it is not the brake lights themselves but some mechanism that was faulty and that has to be replaced. I cannot afford to have them repaired every 3 or 4 months and feel mb should do it since it was a recall and the lighting mechanism should stay fixed.

- Sunnyvale, CA, USA

problem #7

Feb 062015

SLK320 6-cyl

  • 40,900 miles
While driving it, the car will act like I slammed on the brakes and the bas/esp light will come on. I am not hitting the brakes when this happens, I am just driving along. Initially, these events happened at low speeds, more recently it happened at 50mph in the rain. There seems to be no connection to speed, acceleration, turning, or anything other than random faults. Dealer read an esp code C1120-004, 016 esp yaw sensor plausibility occurred 1 time and erased code. They could not duplicate the condition in a short test drive. Nevertheless, it happened again at freeway speed on the way home, and again the following day at slow speed.

- Salinas, CA, USA

problem #6

Jan 062015

SLK320

  • 88,000 miles
Rear break lights were repalced in 2006 recall (05V05000). Same problem in Jan of 2015. No chance of dealer standing behind the recall again. Now I have to pay out of pocket the cost to fix the lights that were recalled prior. Over $600. When they just replaced the recall with the same faulty lights. Turns out their C-class is now having the same recall problem.

- Covina, CA, USA

problem #5

Nov 222013

SLK320

  • 19,472 miles
Driving at lower speed, car rumbles, esp warning light comes on as well as bas/esp. Cars skids to stop. Dry roads, driving normally. Has happened twice since. Very scary.

- Sun City Center, FL, USA

problem #4

Sep 222014

SLK320

  • miles
There is a deadly issue with the 2001 Slk320 and similar models/years, in regards to the lateral speed sensor and the yaw sensor. When these sensors go faulty, they engage the brakes on the car while the car is in motion. The lateral speed sensor triggers the brakes while driving straight forward, and the yaw sensor triggers the brakes when making a right or left turn. This is extremely dangerous, as the car is stopped while it is in motion, regardless of speed. This has happened to me over a handful of times from December 2013 when I purchased the car, up until yesterday, September 22, 2014. This is also a known issue across Mercedes car forums, so it is extremely unsettling that the issue has not been addressed. In regards to my experience: While driving straight, the front passenger side brake is sporadically engaged due to the lateral speed sensor. This has happened to me at various speed limits, and it is very scary as there is no warning. When the brake engages, the car skids to the right as a result of the brake locking. The first time this happened to me I was on a busy highway in the rain and almost skidded into other cars. Yesterday, the brakes engaging almost caused me to drive up a curb and into a fence. This has even occurred while I have been driving up to 60mph, which is incredibly dangerous. As previously stated, there are hundreds of other drivers that have experienced this same safety issue. The lateral speed sensor costs several hundred dollars to replace, while the yaw sensor costs almost $1,000 to replace. Consumers should not have to come out of pocket to pay for a poorly produced product, but with the issue being potentially fatal, owners have had no choice. I adamantly believe that Mercedes needs to address this issue, and recall these sensors. Lives are literally at stake.

- Fort Washington, MD, USA

problem #3

Jan 032014

SLK320 6-cyl

  • 122,000 miles
Car driven normally on cold, clear night. Road condition was fair (dry from centerline to travel lane midpoint w/ hard-packed snow from there to shoulder). Experienced a vibration, squealing noise & slight pull to right. Stopped to investigate possibility of blown tire. Found nothing wrong after visual inspection, so resumed driving. Approx. 15S later, squealing, vibration & sensation of pulling to right returned, then car would not respond to throttle inputs & slowed from 40 to 25mph. Car then shuddered violently w/ loud screeching noise, snapped to right & lost control. Attempts to counter steer were ineffective as car slid on hard-packed snow for approx. 100' & struck snowbank at 20mph. Fortunately snow was very light, dry and fluffy & deceleration was reasonably gentle. No major damage occurred & air bags did not deploy. After extricating, car could not be driven. An observer standing outside the car noted front right wheel would roll for a few feet, then lock up. Shut engine off & restarted (attempting to reset systems). At this point both 'bas esp' and 'ABS' warning lights illuminated (they were not lit previously). Car still could not be driven - front right wheel would lock up after a few feet of travel & had to be towed away. Later determined incident caused by yaw sensor failure. Front right wheel had been locking & sliding on hard packed snow then suddenly regained traction when it crossed a dry patch of pavement, causing the rapid directional change & loss of control. Very dangerous. If car had hit a tree, parked car, etc. Instead of soft snowbank this would have been a serious crash likely w/ injury. Unacceptable & unsafe! please reopen investigation! this is a potentially very dangerous system! sensors should continuously self-check & shut system off completely if failed. This will kill someone eventually if nothing is done!

- Kingston, NH, USA

problem #2

Jun 122013

SLK320

  • 98,000 miles
While driving approximately 30 mph along a straight paved road under clear conditions, the right rear tire suddenly locked. There was a loud screech from the tire. The car immediately fishtailed and swung the rear end of the vehicle into the oncoming lane and directed the car towards the sidewalk where pedestrians were walking. Thankfully, I was not traveling fast! after some research, this seems to be an very dangerous, yet relatively common, issue with Mercedes. Despite the complaints, a NHTSA investigation into the faulty yaw sensor (turn rate sensor) was abandoned. Please reopen the case as this is a serious issue!

- Kihei, HI, USA

problem #1

Jan 122011

SLK320 6-cyl

  • 105,000 miles
The front passenger side brake came on for a few seconds.

- Half Moon Bay, CA, USA