Can I use a CR2032 battery in my Mercedes key fob UK?

No, you cannot use a CR2032 battery in most Mercedes key fobs in the UK as they require CR2025 batteries instead. The key difference is the thickness - 2.5mm for CR2025 vs 3.2mm for CR2032, making them physically incompatible.

CR2025 batteries (used in Mercedes key fobs like those for C-Class, E-Class and S-Class models) have:

• 20mm diameter
• 2.5mm thickness
• 3V nominal voltage
• 140-170mAh capacity

CR2032 batteries (commonly used in other devices) feature:

• 20mm diameter
• 3.2mm thickness
• 3V nominal voltage
• 200-240mAh capacity

For UK Mercedes owners, always check your key fob's manual or the existing battery markings to confirm the correct type. Using the wrong battery size may damage the key fob housing or cause connection issues.