Viper MB204D Select 2008-Up Mercedes Benz Remote Start System

Start your Mercedes from your factory key no aftermarket remote needed

Product Overview

The Viper MB204D is a dedicated remote start system engineered specifically for select Mercedes-Benz vehicles from 2008 onwards. Unlike universal remote start kits that require extensive wiring and separate remotes, the MB204D integrates directly with your factory SmartKey, allowing you to warm up or cool down your vehicle before you get in using the remote you already carry.

Designed for seamless fitment into the Mercedes-Benz platform, the MB204D includes a pre-terminated 20-inch T-harness and a 19.5-foot Keyless Go cable, minimising the need for custom wiring. It suits owners of C Class, CLS Class, SLK Class, E Class coupe and sedan, and GLK Class models who want a clean, factory-integrated remote start solution. SmartStart smartphone module compatibility means you can also upgrade to app-based remote starting down the track.

Key Specifications

• Compatible Vehicles: Select 2008-up Mercedes-Benz C Class; 2012-up CLS Class; 2012-up SLK Class; 2010–2013 E Class (coupe and sedan); 2010-up GLK Class
• Key Integration: Factory SmartKey / Keyless Go compatible
• Valet Mode: Yes disables remote starting when required
• SmartStart Compatible: Yes supports Viper SmartStart smartphone interface modules
• Included Harness: 20-inch T-harness (20-pin plug one end; multiple plugs + valet switch other end)
• Included Cable: 19.5-foot (approx. 5.9 m) Keyless Go cable
• SKU: MB204D
• Brand: Viper (Directed Electronics)

Features & Benefits

• Factory SmartKey integration: Start your Mercedes-Benz using the key fob you already own. No second remote to carry, no aftermarket buttons cluttering your keyring.
• Vehicle-specific engineering: The MB204D is built for the Mercedes-Benz platform, not adapted from a universal kit. This means cleaner installation, fewer workarounds, and reduced risk of fault codes or accessory conflicts.
• Included T-harness and Keyless Go cable: Pre-terminated connectors reduce install time significantly, whether you're in a professional workshop or completing a careful home install.
• Valet mode: Quickly disable remote start functionality when leaving your vehicle with a valet or service centre, preventing unauthorised remote operation.
• SmartStart upgrade path: Compatible with Viper's SmartStart module, allowing you to add smartphone-based remote start and vehicle monitoring via the SmartStart app useful on long Australian commutes or hot Perth summers where pre-cooling your cabin makes a real difference.
• Clean factory finish: Integration with factory systems keeps your dashboard and interior free of aftermarket switches and remotes, preserving the premium feel of your Mercedes-Benz interior.

Technical Specs

• Brand: Viper (Directed Electronics)
• SKU / Part Number: MB204D
• T-harness length: 20 inches (approx. 508 mm)
• T-harness connector: 20-pin plug (one end); multiple plugs + valet switch (other end)
• Keyless Go cable length: 19.5 feet (approx. 5.9 m)
• Key integration type: Factory SmartKey / Keyless Go
• Valet mode: Yes
• SmartStart compatible: Yes
• Weight: Not specified

Compatible With

Confirmed vehicle compatibility:

• 2008-up Mercedes-Benz C Class
• 2012-up Mercedes-Benz CLS Class
• 2012-up Mercedes-Benz SLK Class
• 2010–2013 Mercedes-Benz E Class (Coupe)
• 2010–2013 Mercedes-Benz E Class (Sedan)
• 2010-up Mercedes-Benz GLK Class

Compatible accessories:

• Viper SmartStart smartphone interface module
• Directed Electronics DBALL2 (confirm fitment before combining)

Frequently Asked Questions

Does the MB204D work with my factory Mercedes-Benz key? Yes the MB204D is designed to integrate with your factory SmartKey, so you can activate remote start using the key fob you already have without needing a separate aftermarket remote.

Which Mercedes-Benz models are compatible with the MB204D? The MB204D suits select 2008-up C Class, 2012-up CLS and SLK Class, 2010–2013 E Class coupe and sedan, and 2010-up GLK Class. Always confirm your specific year and variant before purchasing.

Can I control the MB204D from my smartphone? Yes the MB204D is compatible with Viper's SmartStart interface module, which allows smartphone-based remote start and vehicle monitoring. The SmartStart module is sold separately.

What does valet mode do? Valet mode disables the remote start function, preventing the vehicle from being started remotely. This is useful when leaving your Mercedes-Benz with a valet, mechanic, or service centre.

What is included in the box? The MB204D kit includes the remote start module, a 20-inch T-harness, a 19.5-foot Keyless Go cable, operating instructions, and installation instructions everything needed for a complete professional installation.