What Is TAN Coding? TAN is a Transaction Number. It is purchased by a dealer from Mercedes in Germany. These codes unlock features in your car or allows MB Star to code keys. Is It Legal? The legality of creating your own TAN code or bypassing the TAN code...
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MB Star – Clutch Adjustment
Plug the MB Star multiplexer box into the OBD port of the car, turn on the laptop and boot up DAS. Press unlock on the key, place it into the ignition and turn it to position 1 to power the car up. When you get to the main screen, press F2. Press F2. Press F2. Scroll...
MB Star – Paddle Shift Coding
450 Fortwo's With A SAM Unit And All Roadsters Fit First Fit your paddleshift steering wheel and swap the connector over under the dash on the 450 and Roadster. There is no connector to swap for the 451. If it doesn't work after coding, check the wiring. Then Code...
MB Star – Rev Counter Coding
450 Fortwo's Only Plug the MB Star multiplexer box into the OBD port of the car, turn on the laptop and boot up DAS. Press unlock on the key, place it into the ignition and turn it to position 1 to power the car up. When you get to the main screen, press F2. Press F2....
MB Star – Steering Wheel Calibration
450 Fortwo With A SAM And All Roadsters Plug the MB Star multiplexer box into the OBD port of the car, turn on the laptop and boot up Xentry. Press unlock on the key, place it into the ignition and turn it to position 1 to power the car up. When you get to the main...
MB Star – Baby Seat Coding
450 Fortwo With A SAM And All Roadsters So, you have fitted the fixing frame to the car and plugged it in. Time to code it in. Plug the MB Star multiplexer box into the OBD port of the car, turn on the laptop and boot up DAS. Press unlock on the key, place it into...
Hella 451 DRL Repair
The 5 per side Hella daytime running lights on the 451 where surprisingly poor quality and failed regularly.
452 Roadster Passenger Air Bag
If you are changing the passenger airbag on the Roadster, it probably means that it has exploded. If it has, you'll also have to change the top dash pad. Luckily, they are connected. First thing first. Disconnect the battery and leave the key in the house. If you look...
453 Horn Upgrade
Like all previous smart models, the horn is an embarrassment. A single unit that's far too quiet. What we need is a pair of tone matched horns (high and low frequency). Remove the front panel to access the main horn. It's just below the offside headlight... ...hidden...
Roadster Rear Light Faults
The biggest cause of rear lights not working on the Roadster is water damage and corrosion (surprise surprise). So, if a bulb isn't working, obviously 1st check that the bulb filament(s) are ok. Also check to make sure they are fitted correctly. Remove the bulb that...
PAS Controller Waterproofing
Problems Another thing that dies due to water ingress in the Roadster is the power steering controller. However, it also happens in the fortwo 450 although it's much less likely. The reason for the issue is the placement in the cars. This unit sits low in the footwell...
Glow Plug Controller Fault
Symptoms I have had the same email once or twice a year from 450 and 451 CDI owners. "My glow plug light doesn't go out" Normally I recommend replacing the glow plugs and checking the engine earth lead. Normally this fixes it. However, sometimes I get another...
453 Relay Layout
Relay Layout Main Fuse Box (Behind Dashboard) F2 Relay Number Function Specification K1 Heated rear window & mirrors (G Cartier) 20 241 077 35 Amp max K2 Electric windows (G Cartier) 20 241 077 35 Amp max K3 Sliding roof power Not sure, should be the same as K4 I...
Roadster Speedo Dead
The speedo in the Roadster is beginning to suffer from a new common fault. Much like the rest of the Roadster, the speedo electrics are a weak point for a few reasons. Straight After A Battery Reconnect The story usually starts the same way. After reconnecting the...
Roadster Indicator Faults
Roadster Indicator Faults It's surprisingly normal to hear Roadster owners come up against a strange issue along the lines of: 1 or both indicators come on and stay on when I indicate. 1 or both indicators come on and stay on when I turn the car on. 1 or both sides...
Brake Switch Test
The brake light switch failing is a common problem but other things can cause the same symptoms. Makes sense to test your switch before blindly replacing it.
HID Headlight Interference
Radio Interference After HID Installation This is a fairly normal occurrence. The radio signal is fine until you turn on the headlights. But as soon as the headlights are on, you get loads of static interference over the music. What Is It? Radio stations are...
Wishbone Change Roadster
Hit something or had a little crash and bent the wishbone?
Wishbone Change 451
If you have bent a wishbone in a crash or the bushes are failing, fit a new wishbone.
Fitting A Better Horn
The Horn The standard horn fitted to all smarts isn't loud enough. It doesn't draw attention like it should. In fact, it's almost laughable and many people say it's like a scooter horn. There's a reason for that. That's exactly what it is. A single low wattage disc...