HELP Clk 430 stuck in P with BAS ESP ABS warning lights
The switch is inexpensive and easy to change.
Last edited by tastoto; Oct 3, 2008 at 04:21 PM.
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The switch can be changed in 5 to 10 minutes by someone who's done it before. It may take twenty minutes for someone who's never seen it before.
To get to the switch, the plastic cover under the dash (above the brake pedal, and below the steering column) must be lowered. It is lowered by removing the four Phillips head screws that hold the plastic cover in place - three across the front edge and one on the left, near the hood release. Next, the vent cover on the transmission tunnel must be removed. The vent cover has a Phillips head screw that should be rotated a quarter turn counter clockwise. At that point, the vent cover can be pulled out, and the plastic cover can be lowered (not removed) from the front.
With the cover lowered, the switch can be accessed. The old switch will look like one in the attached photo. To remove it, rotate the switch a quarter turn clockwise, and pull it back. The switch on a 2002 CLK has two electrical plugs with three wires on each one. After noting which side of the switch each electrical plug is plugged in on, the plugs from the old switch can be transferred to the new one.

On these cars, the brake light switch is a normal wear part. The switch costs $10 (MBCA discount), so it's easier to change than check. I'd change it and see if the problem
If the Brake or Stoplight switch is bad, the computer won't allow you to shift out of Park because it think you are not press on the brake.
This part is around $20 and 30 minutes to replace.
To get it out of park there is a little door or window close to the shifter. You stick a pen or something like that in the flap and it releases the shifter out of park.
I have a 2003 CLK 430 convertible. (A208)
I had the same symptoms. No spills near shifter, went to shift car out of park, didn't budge, occasionally gave me BAS/ESP/ABS errors when pushing on the brake. Checked the forums, saw the potential issue, checked my brake lights. No lights. Followed MarcusF's instructions (wouldn't have had the courage without them and the accompanying picture). Pulled out the brake light switch, called two dealerships both had it in stock; one quoted $27 and the other $40. Stopped by dealership, picked up the part (no plastic wrapper/box/anything of any kind). It looked EXACTLY like the other one, so I'm not sure what was wrong with the old one. Slapped in the new part, worked like a charm.
I figured I'd upload a few pictures and anecdotes to help anyone else out who might stop by.
Additional pics for steps in MarcusF's instructions:
"It is lowered by removing the four Phillips head screws that hold the plastic cover in place - three across the front edge and one on the left, near the hood release"

"Next, the vent cover on the transmission tunnel must be removed."

"To remove it, rotate the switch a quarter turn clockwise, and pull it back." ADDITIONAL NOTE: In order to remove it, there is small lever/button on its left that you must press. Squeeze this lever (to release a latch) and while still keeping it depressed, turn the brake switch a quarter turn clockwise, then pull it out.

Front view of brake switch.
What makes me think that it may not fix the problem is that I have no issue getting out of park. Just no brake lights and errors as soon as I step on the brake to shift out of park.
I came out of the market at Midnight a mile and a half from home and all these symptoms came up. Walked home thinking about towing fees and repair costs.
Read these postings. Walked back to car and got it in gear. Went to MB dealer and got the part $29.95. Installed, following the instructions here. I am now a happy camper!!!!
Second issue is that theres a 2 second delay when starting the car. I will turn the key and hold it in the crank position and 2 seconds later, it cranks and fires up. Is this a sign of a CPS going bad?
Please help...
g
I have a 2003 CLK 430 convertible. (A208)
I had the same symptoms. No spills near shifter, went to shift car out of park, didn't budge, occasionally gave me BAS/ESP/ABS errors when pushing on the brake. Checked the forums, saw the potential issue, checked my brake lights. No lights. Followed MarcusF's instructions (wouldn't have had the courage without them and the accompanying picture). Pulled out the brake light switch, called two dealerships both had it in stock; one quoted $27 and the other $40. Stopped by dealership, picked up the part (no plastic wrapper/box/anything of any kind). It looked EXACTLY like the other one, so I'm not sure what was wrong with the old one. Slapped in the new part, worked like a charm.
I figured I'd upload a few pictures and anecdotes to help anyone else out who might stop by.
Additional pics for steps in MarcusF's instructions:
"It is lowered by removing the four Phillips head screws that hold the plastic cover in place - three across the front edge and one on the left, near the hood release"

"Next, the vent cover on the transmission tunnel must be removed."

"To remove it, rotate the switch a quarter turn clockwise, and pull it back." ADDITIONAL NOTE: In order to remove it, there is small lever/button on its left that you must press. Squeeze this lever (to release a latch) and while still keeping it depressed, turn the brake switch a quarter turn clockwise, then pull it out.

Front view of brake switch.


you can try taking it out to see if it needs to be adjusted, and/or give it a shot of silicone spray.
-J
My transmission became stuck in park. Lucky for me,
It happened after I returned home and the car was garaged.
I was able to search the problem and found this great string of responses
To the problem. I ordered the part from my local mb dealer, $29.37 and was able to easily exchange the brake light switch in 30 minutes. Note I am not a mechanic so it probably took me longer than most. Bottom line is the transmission releases from park, brake lights work, and no ABS fault lights. The car drives fine.
The posts and pictures were helpful. Thanks to NOBiUS, MarcusF, and all others
Last edited by Doctaz; Jul 15, 2015 at 10:51 AM.









Problem sorted IT WAS THE BRAKE SWITCH SILLY ME