C63Se W206 Engine Light on 5th gear after 3,000 RPM
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C63Se W206 Engine Light on 5th gear after 3,000 RPM
Hello,
I am the owner of a Mercedes C63Se Performance W206 which has only 5,000 KM on the odometer. I have been experiencing serious issue(s) with the said vehicle whereby the car would suddenly ‘vibrate’, and ‘shake’ on 5th gear at 3,000 RPM on Sports mode. The engine light would flash repeatedly and then the engine light would remain on until I switch the car off and on again. If I leave it idle, the car will shake and 'tremble'. The car drives well on Comfort mode or electric mode. I have sent the car to the dealership which has only diagnosed the engine misfiring. But it has not yet determined the cause and which cylinder is misfiring.
Has anyone experienced this before?
Thanks for assistance.
I am the owner of a Mercedes C63Se Performance W206 which has only 5,000 KM on the odometer. I have been experiencing serious issue(s) with the said vehicle whereby the car would suddenly ‘vibrate’, and ‘shake’ on 5th gear at 3,000 RPM on Sports mode. The engine light would flash repeatedly and then the engine light would remain on until I switch the car off and on again. If I leave it idle, the car will shake and 'tremble'. The car drives well on Comfort mode or electric mode. I have sent the car to the dealership which has only diagnosed the engine misfiring. But it has not yet determined the cause and which cylinder is misfiring.
Has anyone experienced this before?
Thanks for assistance.
Super Member
Joined: Jun 2025
Posts: 784
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From: USA
Known issue on early W206 C63 hybrids. Likely a bad ignition coil or spark plug on one cylinder that only fails under high load in higher gears. Tell your dealer to check cylinder 4 or 5 common culprits. Also could be software glitch with the hybrid boost in Sport mode. Push them for a cylinder-specific misfire counter readout, not just a generic code. Don’t let them give it back until they replicate it.
Thread Starter
Newbie
Joined: Apr 2026
Posts: 3
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Known issue on early W206 C63 hybrids. Likely a bad ignition coil or spark plug on one cylinder that only fails under high load in higher gears. Tell your dealer to check cylinder 4 or 5 common culprits. Also could be software glitch with the hybrid boost in Sport mode. Push them for a cylinder-specific misfire counter readout, not just a generic code. Don’t let them give it back until they replicate it.
Super Member
Joined: Jun 2025
Posts: 784
Likes: 250
From: USA
If it’s a V6, probably A 276 906 00 01.
Pull the cover, read it off the coil itself before buying. Stick to Bosch or genuine.
And honestly, swap coil 3 with another cylinder first if the misfire moves, it’s the coil, not the injector.
MBWorld God!
Joined: Dec 2019
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If it’s a 4-cylinder, coil is most likely A 274 906 00 01.
If it’s a V6, probably A 276 906 00 01.
Pull the cover, read it off the coil itself before buying. Stick to Bosch or genuine.
And honestly, swap coil 3 with another cylinder first if the misfire moves, it’s the coil, not the injector.
If it’s a V6, probably A 276 906 00 01.
Pull the cover, read it off the coil itself before buying. Stick to Bosch or genuine.
And honestly, swap coil 3 with another cylinder first if the misfire moves, it’s the coil, not the injector.
Thread Starter
Newbie
Joined: Apr 2026
Posts: 3
Likes: 0
If it’s a 4-cylinder, coil is most likely A 274 906 00 01.
If it’s a V6, probably A 276 906 00 01.
Pull the cover, read it off the coil itself before buying. Stick to Bosch or genuine.
And honestly, swap coil 3 with another cylinder first if the misfire moves, it’s the coil, not the injector.
If it’s a V6, probably A 276 906 00 01.
Pull the cover, read it off the coil itself before buying. Stick to Bosch or genuine.
And honestly, swap coil 3 with another cylinder first if the misfire moves, it’s the coil, not the injector.
