Mercedes-Benz SLK350 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your Mercedes-Benz SLK350

No_car_image
Get a Repair Estimate
Guaranteed by certified locations nationwide. Learn more
Get a Repair Estimate For Your Mercedes-Benz SLK350
RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more
Repair Estimates

Never overpay. Check prices with our estimator

Mercedes-Benz SLK350
$
172
to $
613
Mercedes-Benz SLK350
$
492
to $
1,312
Mercedes-Benz SLK350
$
291
to $
528
Mercedes-Benz SLK350
$
181
to $
497
Mercedes-Benz SLK350
$
617
to $
1,290

Mercedes-Benz SLK350 Problems

Rough Shifting of Automatic Transmission

Vehicles equipped with a 7-speed automatic transmission may develop a rough shifting condition, most commonly going up from first to second gear and going down from third to second or second to first gear. Our technicians tell us this is due to an internal component failure. Mercedes has released updated parts; the transmission will need to be removed and disassembled to complete the necessary repairs.

Oil Seepage on Back of the Cylinder Heads

The Mercedes Benz SLK350 may have engine oil seeping or leaking from the back of the cylinder heads. This is commonly misdiagnosed as leaking valve covers.

On the back of the cylinder heads there are three, in total, plastic expansion plugs that plug access ports to the camshafts. These plugs are well known for seeping oil, and leaking if left unattended. The oil will run down the back of the engine and eventually make it to the ground. 

Replacement of these three plastic plugs is extremely simple, and should be done as regular maintenance. The recommended interval for replacement is every 60,000 miles.

Check Engine Light and Engine Noise

The engine in the SLK350 is known by Mercedes Benz to have issues due to a poorly manufactured gear on the balance shaft (also known as the counter-rotating assembly). Since the balance shaft gear is driven by the timing chain, which keeps the engine rotating synchronously, when it fails, the timing of the engine will change causing:

-Illumination of the Check Engine Light

-Rough Running Conditions

-Stalling

-Loud Rattle or Slapping Noise

-OBD Trouble Code P1200 and P1208

Correction for this issue is replacement of the balance shaft, or balance shaft gear. Replacement of the timing chain and tensioner should be done as well. The Mercedes Benz dealer may cover some or all of the repair cost on select vehicles as a result of a class action settlement.

See More Problems (11)

Mercedes-Benz SLK350 Questions

how much does a new key cost (1 answer)

My Mercedes Benz SLK350 (2006) had error codes 0301 and 0351 (rom Auto Zone (1 answer)

The above codes came on when it was misfiring (which i explained to them is random).I took it to the shop, and they found other codes (I'm sure...it is a 2006). After looking at their codes, they found the bumble flap to be loose. They repaired these..and i was hoping it fixed my problem. The...

how to route small cable from under hood to car's interior? grommet location? (1 answer)

See More Questions (40)

Mercedes-Benz SLK350 Recalls

Driver's Frontal Air Bag Inflator Ruptures And Sprays Metal Fragments

The driver's frontal air bag inflator may deploy the air bag with excessive pressure, resulting in the inflator rupturing and causing metal debris to be sprayed onto vehicle occupants. Dealers will replace the driver's frontal air bag module free of charge to resolve the concern.

Front Passenger Seat Air Bag May Not Deploy Properly

In a crash that deploys vehicle air bags to protect occupants, the passenger seat air bag may not deploy, increasing risk of injury. Dealers will replace the passenger seat air bag free of charge to resolve the problem.

The Passenger Airbag May Not Deploy

The passenger seat cushion contains a sensing device (occupant classification system, or OCS) to determine if a child safety seat is in use on that seat. The system is designed to turn off the passenger airbag when the system senses a child safety seat in use. These vehicles are being recalled because the system may not correctly classify a very light weight person and incorrectly disable the passenger airbag. This would increase the risk of personal injury in the event of a crash. Dealers will replace the passenger seat cushion, including the OCS to correct this concern.

See More Recalls (6)

Mercedes-Benz SLK350 Reviews

I've been driving the 2012 SLK350 since late June 2011. Overall, it's a great car. I love its performance and handling. There has been one annoying mechanical deficit though. A month after I took delivery of the vehicle, it started sounding like a helicopter was hovering about 10 feet overhead. Turns out a fuel pump valve was bad. So, after waiting 3 weeks for the part to arrive from Germany, t...
An excellent convertable. The hard top convertible works well and provides and excellent hard-top driving during off season driving. The car has been a very good value for me. Gas milage has been about 18-20 MPG around town. Despite being small, the trunk holds two sets of golf clubs (carry bag size) but you cannot also put the top down. My only complaints are that it is a roadster, so it is no...
I have to make a trip almost every month for one or other electrical problem. Fix one, and then another one shows up in 5-10 days. Nothing major, mostly turn signals, fog lights, seat belt sensors.

See More Reviews (3)