| Options | Interchange # |
| |
| 166 Type |
| ABS |
| | SEE-545 |
| 166 Type |
| Air Bag |
| GL350 |
| (center console) |
| (ID 1669003803) | 591-75252 |
| GL450 |
| (center console) |
| (ID 1669003803) | 591-75252 |
| GL550 |
| (center console) |
| (ID 1669003803) | 591-75252 |
| GL63 |
| (center console) |
| (ID 1669003803) | 591-75252 |
| 166 Type |
| Communication |
| GL350 |
| emergency call |
| (ID 2229006003) | 591-72969 |
| media interface (RH dash) | 591-71762 |
| telecommunications | 591-72569 |
| GL450 |
| emergency call |
| (ID 2229006003) | 591-72969 |
| media interface (RH dash) | 591-71762 |
| telecommunications | 591-72569 |
| GL550 |
| emergency call |
| (ID 2229006003) | 591-72969 |
| media interface (RH dash) | 591-71762 |
| telecommunications | 591-72569 |
| GL63 |
| emergency call |
| (ID 2229006003) | 591-72969 |
| media interface (RH dash) | 591-71762 |
| telecommunications | 591-72569 |
| 166 Type |
| Door |
| GL350 |
| door |
| front |
| R. |
| (ID 1669009714) | 591-73624 |
| L. |
| (ID 1669000015) | 591-73625 |
| rear |
| R. |
| (ID 1669006307) | 591-73626 |
| L. |
| (ID 1669006507) | 591-73627 |
| liftgate | 591-72068 |
| GL450 |
| door |
| front |
| R. |
| (ID 1669009714) | 591-73624 |
| L. |
| (ID 1669000015) | 591-73625 |
| rear |
| R. |
| (ID 1669006307) | 591-73626 |
| L. |
| (ID 1669006507) | 591-73627 |
| liftgate | 591-72068 |
| GL550 |
| door |
| front |
| R. |
| (ID 1669009714) | 591-73624 |
| L. |
| (ID 1669000015) | 591-73625 |
| rear |
| R. |
| (ID 1669006307) | 591-73626 |
| L. |
| (ID 1669006507) | 591-73627 |
| liftgate | 591-72068 |
| GL63 |
| door |
| front |
| R. |
| (ID 1669009714) | 591-73624 |
| L. |
| (ID 1669000015) | 591-73625 |
| rear |
| R. |
| (ID 1669006307) | 591-73626 |
| L. |
| (ID 1669006507) | 591-73627 |
| liftgate | 591-72068 |
| 166 Type |
| Driver Assist |
| GL350 |
| night vision | 591-71332 |
| park assist |
| ID 1669002307 | 591-72064 |
| ID 1669007507 | 591-72062 |
| surround view | 591-72047 |
| video and radar (LH below dash) |
| ID 0009002003 | 591-73781 |
| ID 0009002706 | 591-72046 |
| ID 0009004701 | 591-72046 |
| GL450 |
| night vision | 591-71332 |
| park assist |
| ID 1669002307 | 591-72064 |
| ID 1669007507 | 591-72062 |
| surround view | 591-72047 |
| video and radar (LH below dash) |
| ID 0009002003 | 591-73781 |
| ID 0009002706 | 591-72046 |
| ID 0009004701 | 591-72046 |
| GL550 |
| night vision | 591-71332 |
| park assist |
| ID 1669002307 | 591-72064 |
| ID 1669007507 | 591-72062 |
| surround view | 591-72047 |
| video and radar (LH below dash) |
| ID 0009002003 | 591-73781 |
| ID 0009002706 | 591-72046 |
| ID 0009004701 | 591-72046 |
| GL63 |
| night vision | 591-71332 |
| park assist |
| ID 1669002307 | 591-72064 |
| ID 1669007507 | 591-72062 |
| surround view | 591-72047 |
| video and radar (LH below dash) |
| ID 0009002003 | 591-73781 |
| ID 0009002706 | 591-72046 |
| ID 0009004701 | 591-72046 |
| 166 Type |
| Fuel Pump |
| GL350 | 591-53974 |
| GL450 |
| (ID 0009006207) | 591-75107 |
| GL550 |
| (ID 0009006207) | 591-75107 |
| GL63 |
| (ID 0009006207) | 591-75107 |
| 166 Type |
| Information-GPS-TV |
| GL350 |
| (navigation, RH side dash) | 591-72566 |
| GL450 |
| (navigation, RH side dash) | 591-72566 |
| GL550 |
| (navigation, RH side dash) | 591-72566 |
| GL63 |
| (navigation, RH side dash) | 591-72566 |
| 166 Type |
| Lamp |
| GL350 |
| below LH rear seat |
| (ID 1669003912) | 591-73621 |
| LH side dash (light range control) | 591-72136 |
| RH side dash |
| bi-xenon headlamps | 591-73619 |
| halogen headlamps | 591-73782 |
| GL450 |
| below LH rear seat |
| (ID 1669003912) | 591-73621 |
| LH side dash (light range control) | 591-72136 |
| RH side dash |
| bi-xenon headlamps | 591-73619 |
| halogen headlamps | 591-73782 |
| GL550 |
| below LH rear seat |
| (ID 1669003912) | 591-73621 |
| LH side dash (light range control) | 591-72136 |
| RH side dash |
| bi-xenon headlamps | 591-73619 |
| halogen headlamps | 591-73782 |
| GL63 |
| below LH rear seat |
| (ID 1669003912) | 591-73621 |
| LH side dash (light range control) | 591-72136 |
| RH side dash |
| bi-xenon headlamps | 591-73619 |
| halogen headlamps | 591-73782 |
| 166 Type |
| Multifunction |
| (keyless ignition) |
| GL350 |
| ID 1669001601 | 591-71338 |
| ID 1669006208 | 591-72073 |
| ID 2129008729 | 591-73549 |
| GL450 |
| ID 1669001601 | 591-71338 |
| ID 1669006208 | 591-72073 |
| ID 2129008729 | 591-73549 |
| GL550 |
| ID 1669001601 | 591-71338 |
| ID 1669006208 | 591-72073 |
| ID 2129008729 | 591-73549 |
| GL63 |
| ID 1669001601 | 591-71338 |
| ID 1669006208 | 591-72073 |
| ID 2129008729 | 591-73549 |
| 166 Type |
| Parking Brake |
| GL350 |
| ID 2469003014 | 591-72971 |
| ID 2469004512 | 591-72971 |
| GL450 |
| ID 2469003014 | 591-72971 |
| ID 2469004512 | 591-72971 |
| GL550 |
| ID 2469003014 | 591-72971 |
| ID 2469004512 | 591-72971 |
| GL63 |
| ID 2469003014 | 591-72971 |
| ID 2469004512 | 591-72971 |
| 166 Type |
| Suspension |
| GL350 |
| stability control (below driver seat) | 591-72054 |
| tire pressure | 591-72976 |
| GL450 |
| stability control (below driver seat) | 591-72054 |
| tire pressure | 591-72976 |
| GL550 |
| stability control (below driver seat) | 591-72054 |
| tire pressure | 591-72976 |
| GL63 |
| stability control (below driver seat) | 591-72054 |
| tire pressure | 591-72976 |
| 166 Type |
| Towing Control |
| (trunk mounted) |
| GL350 | 591-74121 |
| GL450 | 591-74121 |
| GL550 | 591-74121 |
| GL63 | 591-74121 |
| 166 Type |
| Transfer Case |
| GL450 (Off Road package) | 591-72051 |
| GL550 (Off Road package) | 591-72051 |