Remove the bonnet and look behind the headlight with the bulb you want to change. Arrowed below is the bulb cover. Push the top back and lift it out from the car. Put it on the scuttle so you don't lose it. You can now see the back of the bulb and the electrical...
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Kane Harrison
453 Headlight Pinout
Pre Facelift Headlight - Basic Pin Number Wire Colour Function/Connection 1 Grey Standing Light Signal 2 Blue Standing Light + 3 Green Low Beam 4 Black Earth/Ground 5 Pink High Beam 6 N/C Pin Number Wire Colour Function/Connection 1 N/C 2 N/C 3 N/C Pre...
453 Headlight Removal
To gain access to the headlights, you have to remove the front bumper, see here. This is what you'll be left with. Using a 10mm hex or Torx30, remove the inner bolt. Look at the front edge of the arch panel and remove these 2 bolts also. This disconnects it from the...
453 Headlight Upgrade
These are the boring standard headlights with warm white DRLs. Let's change them for the upgrade headlights. On the left is the old, on the right is the new. Same again but lit up. The upgrade headlights have a cool white strip which looks much nicer. Remove the front...
453 Heated Seat Retrofit
Does your 453 not have heated seats? Do you want heated seats? It's probably not as tricky as you think. Warning - you are disconnecting and reconnecting seats with airbags built in. Disconnect the battery before starting. If you are too heroic to disconnect the...
453 Heater Resister Removal
Turn yourself upside down and throw yourself as hard as you can into the nearside footwell. Take a torch with you. Look to the centre of the car and you'll see the cabin fan. Just forward of the fan, you'll see another connector. This is the heater resistor. Squeeze...
453 Horn Fault
453 Horn Doesn't Work This is a new one that's appearing more regularly on the 453. What confused me was that most people also had issues with their headlights in some way. So, I took a long look at the terrible wiring diagrams for the 453 to see if I could find a...
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...
453 Ignition Key Stuck
My Ignition Key Won't Come Out! Yep, it's a new common problem, only on petrol 453's with an automatic gearbox or the 453 ED/EQ electric drive cars. Why Doesn't It Just Come Out Like A Normal Key? On the manual cars, the car doesn't care what position the gearbox is...
453 Indicator Bulb Change
Small Access Panel Look into the front edge of the front wheel arches on your 453. You'll see a flap. Pull the tab down and pull the flap by the central finger hold. You don't need to jack the car up to gain access but if you need more room, go for it. Just steering...
453 JBL Boot Sub Woofer
Removable JBL Sub Woofer Information This is the sub that can be bought from smart (part numbers coming later with the other parts required). It's a fairly compact bass box that can be fitted and removed from the left hand side of the boot. The speaker is 165mm in...
453 JBL Tweeters
Important People, will you please stop getting ripped off! I have lost count how many times I have heard someone say: "smart/Mercedes will be expensive for parts so I bought parts from somewhere else" Where do you think these 3rd party companies buy these specialist...
453 Key Fob Battery
453 Original Style Before smart transistioned over to the flip key style, we had this crappy Renault key. Flip it over and... ...remove the screw. The blade can be pulled out if you want. You don't have to. Pull the 2 halves apart and you'll see the CR2016 battery in...
453 Lambda Sensors
Non Turbo B90 Position Number Of Wires Bandwidth Part Number Upstream (manifold) 5 Wideband A453 542 05 00 DownStream (catalytic convertor) 4 Narrowband A453 542 06 00 Turbo B91 Position Number Of Wires Bandwidth Part Number Upstream (turbo) 5 Wideband A453 542 05 00...
453 LED Indicator Coding
Fast Flashing If you fit LEDs to any of the indicator bulbs, there is a good chance that you'll experience fast flashing. This could be replacement LED bulbs, replacement full LED front or rear lights. Coding It Out If your car is 2017 or newer, you should be able to...
453 Light/Wiper Stalk Removal
The top cover behind the steering wheel is just clipped in place. Just lift it up with a bit of force. Look under the steering wheel, you'll see 2x Torx20 screws. Remove them. Pull the bottom cover down. You'll then have access to the 2x Torx10 screws holding...
453 Mirror Cap Removal
So, you want to remove the outside mirror cap since it's been smashed to pieces or you want to paint it. Firstly, you have to remove the mirror. See here. With the mirror removed, you can see 3 screws holding the adjuster in place. Remove them with a Torx10 bit. The...
453 Mirror Glass Removal
So, you either broke the mirror or need to get the mirror cap off. Adjust the mirror all of the way in... ...so you have enough room to get your fingers behind the mirror. Don't pull the mirror from the edge, try and reach behind the mirror to pull it off. It should...
453 Multimedia Radio Pin Out
This is the rear of the radio unit that connects to the touch screen multimedia unit. It is the most basic version of the radio unit. It is hidden behind the dash. The 3 main connectors are: BB - Speaker outputs, power input and earth. BC - Data outputs and inputs to...
453 NA Brake Upgrade
Better Discs? If you have the non turbo or the ED/EQ 453, you have the 12mm single thickness discs (lower disc shown below). You can fit the 22mm double thickness vented discs from the turbo 453 (upper disc shown below). These are Brembo 09.9078.75 discs. They are...