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・Save up to 30%

Get a quote

What others are asking

Q: Automatic Trunk open/close feature not working but button lights up. I soldiered broken wires back together - reset?

Hello, thanks for writing in. Most of the time this is caused by a programming issue with the control module. It usually occurs if the module fails or if there is a loss of power. It can also occur if...

Q: Car overheating

There may be an issue with a leaking radiator or stuck thermostat or bad water pump on this engine. I recommend having a mechanic, such as one from YourMechanic, inspect your vehicle's overheating issue for you. I recommend you do...

Q: Gears not sticking

It sounds like the synchronizers or syncros have gone out inside your gearbox. A good transmission shop could rebuild your gearbox or install a remanufactured unit. I would recommend having a certified technician verify and diagnose this gear shifting issue.

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...