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Mercedes-Benz SLK350Model year report

2006 Mercedes-Benz SLK350 Problems

Complaints
10filed with NHTSA
Median mileage
47,169miles, 8 complaints with mileage
Recalls
0campaigns on record
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA crash rating
—overall rating starts with 2011 models
EPA fuel economy
19 mpgcombined, 3.5L 6-cyl RWD · 17 city / 22 hwy

Sources: NHTSA records for the 2006 Mercedes-Benz SLK350 (complaints, recalls, investigations), EPA fuel economy. Report an error

NHTSA recorded 10 consumer complaints for the 2006 Mercedes-Benz SLK350. The part named most often is transmission and drivetrain, with 5 complaints (50% of the total), followed by engine (2) and vehicle speed control (2). 8 of the complaints include a mileage, and 50% of those were filed for vehicles with under 50,000 miles; the median is 47,169 miles. Of all complaints, 1 involved a crash, 1 a fire, 1 an injury, according to the filers. NHTSA lists 0 recall campaigns and 63 technical service bulletins for this model year. Transmission and drivetrain complaints overlap with 4 technical service bulletins filed under the same part. Engine complaints overlap with 3 technical service bulletins filed under the same part.

This model year has fewer than 25 complaints on record, so the numbers below can change a lot with a few new reports.

Which parts are reported most

Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.

Example complaints

Transmission and drivetrain: “While driving vehicle power can be lost & vehicle can be stuck in 1st gear or no gear at all causing blockage to traffic and possibly causing an accident. Once you turn car off it appears the car resets itself as if nothing ever happen. When reported to dealership it was stated no codes pop up so I must be hitting the shift. Not knowing any better & not being a mechanic, who am I to continue to question the mercedes dealership? No code no action. (1st reported with 8446 mileage never showed a code). At 63,000 miles the engine light finally comes on indicating a problem. …”

NHTSA complaint #10811255, filed 2015-12, 8,446 miles

Vehicle speed control: “The contact owns a 2006 mercedes benz slk250. When attempting to approach a complete stop, the vehicle abnormally accelerated. The contact depressed the brake pedal and heard a loud grinding noise. There was a sudden increase in RPM's and the vehicle continued to accelerate, which caused him to crash. There were no warning indicators illuminated prior to the failure. The contact sustained severe injuries from the crash and was transported to the hospital. The vehicle was completely destroyed. The cause of the failure was unknown. …”

NHTSA complaint #10253355, filed 2008-12, 14,000 miles

Mileage when problems were reported

50% of the 8 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 25,868 and 66,000 miles.

13%0–1013%10–2525%25–5025%50–7513%75–10013%100–1500%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (8 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 47,169 miles.

Complaints by year filed

Fewer than 15 complaints, too few for a reliable trend.

20082010201220154201620192022
Complaints by year the complaint was filed with NHTSA. Red bars: the last 3 full calendar years used for the trend. The current year (2026) is partial.

Fuel economy and running cost

EPA ratings for each 2006 Mercedes-Benz SLK350 version. Annual fuel cost is the EPA's estimate at its current fuel prices for 15,000 miles a year (55% city driving).

VersionEngineTransmissionCityHwyComb.Fuel / yr
SLK350 RWD3.5L 6-cyl7-speed automatic172219$4,350
SLK350 RWD3.5L 6-cyl6-speed manual162319$4,350

Source: U.S. EPA and Department of Energy, fueleconomy.gov. Ratings are for comparing vehicles; real-world mileage varies with driving and conditions.

Recalls and investigations

NHTSA lists no recall campaigns for the 2006 Mercedes-Benz SLK350 in the data used here. A recall can apply to some vehicles of a model year and not others, so check a specific vehicle by VIN at nhtsa.gov/recalls.

Technical service bulletins

TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 63 on record; the latest 10 are shown.

See all 63 bulletins →

Other model years of the Mercedes-Benz SLK350

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
20121222,6880—23—Not enough data
20071345,0001—19—Not enough data
20061047,1690—19—Not enough data
20052154,4260—19—Rising

All Mercedes-Benz SLK350 model years

Frequently asked questions

How many NHTSA complaints does the 2006 Mercedes-Benz SLK350 have?

NHTSA recorded 10 consumer complaints for the 2006 Mercedes-Benz SLK350 as of Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2006 Mercedes-Benz SLK350 is reported most often?

Transmission and drivetrain is named most often, in 5 complaints (50% of the total), followed by engine with 2.

Has the 2006 Mercedes-Benz SLK350 been recalled?

NHTSA lists no recall campaigns for this model year in the data used here. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

What gas mileage does the 2006 Mercedes-Benz SLK350 get?

The EPA rates the 2006 Mercedes-Benz SLK350 (SLK350, 3.5L 6-cyl) at 19 mpg combined, 17 city and 22 highway, with an estimated annual fuel cost of $4,350 at 15,000 miles a year. Other engine and drive versions are rated differently.

At what mileage are problems with the 2006 Mercedes-Benz SLK350 reported?

Among the 8 complaints that include a mileage, the median is 47,169 miles and the middle half falls between 25,868 and 66,000 miles; 50% were filed for vehicles with under 50,000 miles.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Fuel economy is from the EPA and DOE (fueleconomy.gov).

Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.