24/7 mobile jump start for your Mercedes-Benz EQB 300 (1980–2026) in Sacramento using Surge-Protected 2,500A Peak 12V Pro Booster Pack.
Under-hood sliding brass/red cover (+) terminal near firewall and unpainted brass ground (-) post on strut housing. Main battery is typically under the front passenger seat (GLE/ML/GLS/GL), under the driver's floorboard (Sprinter/Metris), or in the trunk (E-Class/S-Class/C-Class).
Mercedes vehicles often use a dual-battery architecture (Main Cranking AGM + Auxiliary Battery/Capacitor for the 7G/9G-Tronic ISM electronic shifter) and a Front Pre-Fuse Box (F32) with a pyrotechnic squib. Using cheap unregulated jumper cables can blow the F32 pre-fuse or lock the electronic steering lock (ESL/ELV).
Post-boost verification of HV-to-LV DC-DC Converter (14.4V / 15.5V) output (13.8V–14.8V on 12V; 27.6V–28.4V on 24V commercial).
| Generation | Battery Group | CCA | Alternator | Starter | System Notes |
|---|---|---|---|---|---|
| EQB 300 (2021–2026) | Group 51R / Group 47 (H5) / 12V Aux or 16V Li-Ion | 410–680 CCA / Low-Voltage Contactor Supply | HV-to-LV DC-DC Converter (14.4V / 15.5V) (14.2V–14.8V) | HV Main Contactor & Motor-Generator | Smart LIN/BSD Regulated AGM / Aux |
| EQB 300 (2015–2020) | Group 51R / Group 47 (H5) / 12V Aux or 16V Li-Ion | 410–680 CCA / Low-Voltage Contactor Supply | HV-to-LV DC-DC Converter (14.4V / 15.5V) (14.0V–14.6V) | HV Main Contactor & Motor-Generator | High-Reserve AGM / EFB Start-Stop |
| EQB 300 (2008–2014) | Group 51R / Group 47 (H5) / 12V Aux or 16V Li-Ion | 410–680 CCA / Low-Voltage Contactor Supply | HV-to-LV DC-DC Converter (14.4V / 15.5V) (13.8V–14.4V) | HV Main Contactor & Motor-Generator | High-CCA AGM / Lead-Acid |
| EQB 300 (1998–2007) | Group 51R / Group 47 (H5) / 12V Aux or 16V Li-Ion | 410–680 CCA / Low-Voltage Contactor Supply | HV-to-LV DC-DC Converter (14.4V / 15.5V) (13.8V–14.2V) | HV Main Contactor & Motor-Generator | OEM Group Lead-Acid / AGM |
| EQB 300 (1980–1997) | Group 51R / Group 47 (H5) / 12V Aux or 16V Li-Ion | 410–680 CCA / Low-Voltage Contactor Supply | HV-to-LV DC-DC Converter (14.4V / 15.5V) (13.6V–14.2V) | HV Main Contactor & Motor-Generator | Standard BCI High-CCA |
