Radio Locked Please Contact Dealer First things first, don't contact your dealer because they won't/can't help. All they will do is sell you a new replacement stereo. 2nd Hand Radio The majority of the basic 453 radios have antitheft activated. They are also coded to...
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I Can Smell Fuel – Roadster
Check The Fuel Pump Seal This is the biggest reason for a fuel smell in the cabin after filling the tank. As the tank is filled, the air that is pushed out of the tank by the incoming fuel is normally passed through a charcoal filter, so you don't smell it. However,...
Roadster Charcoal Canister
Removal Of The Canister Look at the rear offside of the car. Jack the car up, remove the wheel and remove the arch liner to reveal the charcoal canister in the front of the arch. The inlet and outlet pipe run down and into the underneath of the canister. Cut the zip...
453 Rear Speaker Fitting
Before your starting this mod you need to know 3 things. It's not the full system, is just some hack. The original system has a JBL amplifier under the seat, the subwoofer in the boot and all the cables available. I have just installed the rear speakers. The purple...
Hashtag Physical Key
If the key or the car runs out of battery, the central locking won't work so you'll need to access the physical key. This explains the excessive size of the fob. It's bloody massive! It's like a Frisbee. Flip it over and you'll notice the smart logo is in the...
Hashtag Key Battery
The #1 key is bloody massive! It's like a Frisbee. Flip it over and you'll notice the smart logo is in the direction as the front buttons. To access the battery, the back of the key needs to be rotated 15 degrees clockwise... ...and it'll end up like this. However,...
453 EQ HV Service Plug
If you are doing any work on the high voltage side of the car, any orange cables or any electrical controllers for the battery or motor, you really should be pulling the service disconnect plug to stop the system from being able to apply the 400 volts through the HV...
EQ Pioneer Switching Issue
My Pioneer Stereo Turns On By Itself Not long after fitting the SPH-EVO62DAB stereo, I was laying in bed trying to get to sleep. I live in the middle of nowhere so it's usually very quiet but I could hear music. I figured it was some kids parked up on one of the...
Why Is My 453 Listed As A 451?
Your 453 Is Listed As A 451 In The Documents 453s in most EU countries had 451 on the ownership documentation. WTF! Photo by Giampiero M Smart did this because Mercedes were dodgy wankers trying to get around stupid "green" rules. The EU had mandated that all new...
450 Steering Rack Removal
Caution Before you continue, it is highly recommended that you immobilise the steering wheel so it can't move later on when you disconnect the column from the rack. I normally use elastic bungie cords from the driver's seat base, wrapped around the bottom of the...
#1 Over The Air Updates
Over The Air Update Versions & Features 1.1.0 - January 2023 - China Only Optional assistant now includes a white fox or a border collie. Ambient light option to react to music. Holiday themed "Easter eggs" on central display. 4 new skins fro the central display....
450 Rear Bulb Change
600cc And 700cc Smart Coupe & Cabrio The coupe and cabrio rear lights look but are fixed the same. Open the rear hatch, using a 10mm socket remove the 2 plastic nuts circled. Pull the edge of the light over the bolts and swing the unit towards the outside of the...
454 Clutch Actuator Setting
Note Do not touch clutch actuator on the tappet or the rubber bellow. Never touch the electric connector. The servo motor sensor system can be destroyed by static discharge. Removing The Clutch Actuator Switch off the ignition. Wait for the stopping time of the...
451 Clutch Actuator Setting
Note Do not touch clutch actuator on the tappet or the rubber bellow. Never touch the electric connector. The servo motor sensor system can be destroyed by static discharge. Removing The Clutch Actuator Switch off the ignition. Wait for the stopping time of the...
453 Bosch Stereo Pin Out
Bosch "Smart Media-System Connect" Connector A Pin Number Wire Colour Function 1 2 Grey/White CAN Bus High 3 Brown/White CAN Bus Low 4 Pink On/Off Signal Audio Gateway Controller Pin 11 (Amplifier pin 11, if present) 5 6 7 Red/Brown Fuse 26 8 Black/Brown Ground/Earth...
453 Auto Headlights
Retrofitting Auto Headlights To The 453 Pre-Facelift (Nov 2014 - Oct 2019) First you have to fit a new headlight stalk, click here. You can't just use any old light stalk, it must have the word "auto" on it. From what I can tell, all 453 models already have the...
454 Heater Bulbs
Heater Control Bulbs There are 3 bulbs that illuminate the heater controls on the 454 forfour. Remove the heater control panel from the car and lever the 3 clips open... ...and separate the 2 halves. The 6 buttons, 3 LEDs and 3 bulbs are now visible. The bulbs sit...
450 Coolant Specifications
Coolant Colour Don't pay too much attention to the colour of the coolant, it doesn't necessarily tell you what it is made from (propylene glycol, ethylene glycol etc). It is recommended that you top up with the same type coolant but if you bought the car new, you...
451 Dump Valve
Because I wanted a dump valve on my 451 turbo, we spent thousands having having custom silicone pipes made by Forge Motorsport. They cost us an absolute shitload each so we stuck the rest on SmartMods just in case anyone else wants to do the same. This is the T piece....
Roadster Aerial Grommet
So, Your Aerial Grommet Has Perished Previously you'd just have gone to a smart dealer and ordered part number 0013787V003000000 for about £7. However... Rubber Grommet No Longer Available Smart discontinued the rubber grommet. The problem is that people are noticing...