Skip the auto shop - Our mechanics make house calls

Q: 2007 Mercedes-Benz SL55 AMG on occasion will not shift up from first gear. What's the cause?

asked by on

On occasion, (Not Always) car will not shift up from first gear. Have to pull over, stop engine, restart engine and drive, it then shifts as normally should. Could this be a Transmission Speed Sensor issue? If so, where is it located and how much does it cost to replace?? Looking forward to your response.

My car has 50457 miles.
My car has an automatic transmission.

A: Hello there, many faults will cause your 20...

Hello there, many faults will cause your 2007 Mercedes SL55 to have issues upshifting from first gear. The most common faults are low transmission fluid level, shift solenoid, shift cable fault, transmission control module fault, or a failing valve body.

I would suggest having this car looked at to avoid any unnecessary repairs. A qualified technician such as one from YourMechanic will be able to diagnose your car’s shifting issues and make any repairs required to resolve the issue.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: ABS, ESP, EBR malfunction

You're getting into an area that is kind of a dark art when you're getting these kinds of codes. While I don't know any of the symptoms that the car is exhibiting, I can tell you that failure in one...

Q: Over heating

This can be caused by a number of things such as low coolant levels, a faulty thermostat, or a failing coolant fan switch. As you may know the coolant fan switch helps to maintain the proper coolant temperature by turning...

Q: Car won't shift into 1st gear.

Hi and thanks for contacting YourMechanic. From what you've described, you'll need to check the adjustment of the cable. The cable may be too short, not letting the transmission engage 1st gear. If you need a diagnosis with your shifting...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.